Finding the Fourth Proportional to 129,123.16, 193,743.18 and 65,910.66

Step by Step Solution

1. Step 1: Write the proportion equation
   129,123.16 : 193,743.18 = 65,910.66 : x
2. Step 2: Convert to fraction form
   129,123.16/193,743.18 = 65,910.66/x
3. Step 3: Cross multiply
   129,123.16x = 193,743.18 × 65,910.66
4. Step 4: Simplify right side
   129,123.16x = 12,769,740,864.30
5. Step 5: Solve for x
   x = 12,769,740,864.30/129,123.16
6. Step 6: Final answer
   x = 98,895.82