Finding the Fourth Proportional to 131,685.98, 197,549.49 and 42,918.89

Step by Step Solution

1. Step 1: Write the proportion equation
   131,685.98 : 197,549.49 = 42,918.89 : x
2. Step 2: Convert to fraction form
   131,685.98/197,549.49 = 42,918.89/x
3. Step 3: Cross multiply
   131,685.98x = 197,549.49 × 42,918.89
4. Step 4: Simplify right side
   131,685.98x = 8,478,604,830.87
5. Step 5: Solve for x
   x = 8,478,604,830.87/131,685.98
6. Step 6: Final answer
   x = 64,385.02