Finding the Fourth Proportional to 102,665.38, 141,668.22 and 57,339.76

Step by Step Solution

1. Step 1: Write the proportion equation
   102,665.38 : 141,668.22 = 57,339.76 : x
2. Step 2: Convert to fraction form
   102,665.38/141,668.22 = 57,339.76/x
3. Step 3: Cross multiply
   102,665.38x = 141,668.22 × 57,339.76
4. Step 4: Simplify right side
   102,665.38x = 8,123,221,734.43
5. Step 5: Solve for x
   x = 8,123,221,734.43/102,665.38
6. Step 6: Final answer
   x = 79,123.28