Finding the Fourth Proportional to 102,666.89, 141,678.82 and 57,345.52

Step by Step Solution

1. Step 1: Write the proportion equation
   102,666.89 : 141,678.82 = 57,345.52 : x
2. Step 2: Convert to fraction form
   102,666.89/141,678.82 = 57,345.52/x
3. Step 3: Cross multiply
   102,666.89x = 141,678.82 × 57,345.52
4. Step 4: Simplify right side
   102,666.89x = 8,124,645,605.89
5. Step 5: Solve for x
   x = 8,124,645,605.89/102,666.89
6. Step 6: Final answer
   x = 79,135.99