Finding the Fourth Proportional to 102,665.36, 141,675.30 and 57,342

Step by Step Solution

1. Step 1: Write the proportion equation
   102,665.36 : 141,675.30 = 57,342 : x
2. Step 2: Convert to fraction form
   102,665.36/141,675.30 = 57,342/x
3. Step 3: Cross multiply
   102,665.36x = 141,675.30 × 57,342
4. Step 4: Simplify right side
   102,665.36x = 8,123,945,052.60
5. Step 5: Solve for x
   x = 8,123,945,052.60/102,665.36
6. Step 6: Final answer
   x = 79,130.35