Finding the Fourth Proportional to 143,400,479,993.94, 197,910,015,366 and 81,616,071,643.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,400,479,993.94 : 197,910,015,366 = 81,616,071,643.50 : x
2. Step 2: Convert to fraction form
   143,400,479,993.94/197,910,015,366 = 81,616,071,643.50/x
3. Step 3: Cross multiply
   143,400,479,993.94x = 197,910,015,366 × 81,616,071,643.50
4. Step 4: Simplify right side
   143,400,479,993.94x = 16,152,637,993,077,641,838,592
5. Step 5: Solve for x
   x = 16,152,637,993,077,641,838,592/143,400,479,993.94
6. Step 6: Final answer
   x = 112,640,055,275.69