Finding the Fourth Proportional to 86,061.28, 129,028.32 and 36,156.16

Step by Step Solution

1. Step 1: Write the proportion equation
   86,061.28 : 129,028.32 = 36,156.16 : x
2. Step 2: Convert to fraction form
   86,061.28/129,028.32 = 36,156.16/x
3. Step 3: Cross multiply
   86,061.28x = 129,028.32 × 36,156.16
4. Step 4: Simplify right side
   86,061.28x = 4,665,168,582.45
5. Step 5: Solve for x
   x = 4,665,168,582.45/86,061.28
6. Step 6: Final answer
   x = 54,207.52