Finding the Fourth Proportional to 131,687.98, 197,552.49 and 42,920.89

Step by Step Solution

1. Step 1: Write the proportion equation
   131,687.98 : 197,552.49 = 42,920.89 : x
2. Step 2: Convert to fraction form
   131,687.98/197,552.49 = 42,920.89/x
3. Step 3: Cross multiply
   131,687.98x = 197,552.49 × 42,920.89
4. Step 4: Simplify right side
   131,687.98x = 8,479,128,692.52
5. Step 5: Solve for x
   x = 8,479,128,692.52/131,687.98
6. Step 6: Final answer
   x = 64,388.02