Finding the Fourth Proportional to 86,061.72, 129,143.10 and 36,137.98

Step by Step Solution

1. Step 1: Write the proportion equation
   86,061.72 : 129,143.10 = 36,137.98 : x
2. Step 2: Convert to fraction form
   86,061.72/129,143.10 = 36,137.98/x
3. Step 3: Cross multiply
   86,061.72x = 129,143.10 × 36,137.98
4. Step 4: Simplify right side
   86,061.72x = 4,666,970,119.22
5. Step 5: Solve for x
   x = 4,666,970,119.22/86,061.72
6. Step 6: Final answer
   x = 54,228.18