Finding the Fourth Proportional to 129,933.57, 194,978.10 and 56,061.57

Step by Step Solution

1. Step 1: Write the proportion equation
   129,933.57 : 194,978.10 = 56,061.57 : x
2. Step 2: Convert to fraction form
   129,933.57/194,978.10 = 56,061.57/x
3. Step 3: Cross multiply
   129,933.57x = 194,978.10 × 56,061.57
4. Step 4: Simplify right side
   129,933.57x = 10,930,778,401.62
5. Step 5: Solve for x
   x = 10,930,778,401.62/129,933.57
6. Step 6: Final answer
   x = 84,125.90