Finding the Fourth Proportional to 151,643, 209,199.72 and 87,943.88

Step by Step Solution

1. Step 1: Write the proportion equation
   151,643 : 209,199.72 = 87,943.88 : x
2. Step 2: Convert to fraction form
   151,643/209,199.72 = 87,943.88/x
3. Step 3: Cross multiply
   151,643x = 209,199.72 × 87,943.88
4. Step 4: Simplify right side
   151,643x = 18,397,835,071.71
5. Step 5: Solve for x
   x = 18,397,835,071.71/151,643
6. Step 6: Final answer
   x = 121,323.34