Finding the Fourth Proportional to 102,424.50, 141,346.42 and 57,105.34

Step by Step Solution

1. Step 1: Write the proportion equation
   102,424.50 : 141,346.42 = 57,105.34 : x
2. Step 2: Convert to fraction form
   102,424.50/141,346.42 = 57,105.34/x
3. Step 3: Cross multiply
   102,424.50x = 141,346.42 × 57,105.34
4. Step 4: Simplify right side
   102,424.50x = 8,071,635,371.88
5. Step 5: Solve for x
   x = 8,071,635,371.88/102,424.50
6. Step 6: Final answer
   x = 78,805.71