Finding the Fourth Proportional to 129,057.71, 193,613.36 and 65,051.78

Step by Step Solution

1. Step 1: Write the proportion equation
   129,057.71 : 193,613.36 = 65,051.78 : x
2. Step 2: Convert to fraction form
   129,057.71/193,613.36 = 65,051.78/x
3. Step 3: Cross multiply
   129,057.71x = 193,613.36 × 65,051.78
4. Step 4: Simplify right side
   129,057.71x = 12,594,892,406.46
5. Step 5: Solve for x
   x = 12,594,892,406.46/129,057.71
6. Step 6: Final answer
   x = 97,591.17