Finding the Fourth Proportional to 42,658.38, 63,990.50 and 13,096.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,658.38 : 63,990.50 = 13,096.85 : x
2. Step 2: Convert to fraction form
   42,658.38/63,990.50 = 13,096.85/x
3. Step 3: Cross multiply
   42,658.38x = 63,990.50 × 13,096.85
4. Step 4: Simplify right side
   42,658.38x = 838,073,594.49
5. Step 5: Solve for x
   x = 838,073,594.49/42,658.38
6. Step 6: Final answer
   x = 19,646.17