Finding the Fourth Proportional to 105,159.47, 144,969.35 and 64,846.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105,159.47 : 144,969.35 = 64,846.17 : x
2. Step 2: Convert to fraction form
   105,159.47/144,969.35 = 64,846.17/x
3. Step 3: Cross multiply
   105,159.47x = 144,969.35 × 64,846.17
4. Step 4: Simplify right side
   105,159.47x = 9,400,706,790.66
5. Step 5: Solve for x
   x = 9,400,706,790.66/105,159.47
6. Step 6: Final answer
   x = 89,394.78