Finding the Fourth Proportional to 101,401.16, 139,938.18 and 56,689.16

Step by Step Solution

1. Step 1: Write the proportion equation
   101,401.16 : 139,938.18 = 56,689.16 : x
2. Step 2: Convert to fraction form
   101,401.16/139,938.18 = 56,689.16/x
3. Step 3: Cross multiply
   101,401.16x = 139,938.18 × 56,689.16
4. Step 4: Simplify right side
   101,401.16x = 7,932,977,876.13
5. Step 5: Solve for x
   x = 7,932,977,876.13/101,401.16
6. Step 6: Final answer
   x = 78,233.60