Finding the Fourth Proportional to 102,663.86, 141,673.23 and 57,340.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,663.86 : 141,673.23 = 57,340.50 : x
2. Step 2: Convert to fraction form
   102,663.86/141,673.23 = 57,340.50/x
3. Step 3: Cross multiply
   102,663.86x = 141,673.23 × 57,340.50
4. Step 4: Simplify right side
   102,663.86x = 8,123,613,844.82
5. Step 5: Solve for x
   x = 8,123,613,844.82/102,663.86
6. Step 6: Final answer
   x = 79,128.28