Finding the Fourth Proportional to 42,105.90, 63,171.42 and 12,524.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,105.90 : 63,171.42 = 12,524.70 : x
2. Step 2: Convert to fraction form
   42,105.90/63,171.42 = 12,524.70/x
3. Step 3: Cross multiply
   42,105.90x = 63,171.42 × 12,524.70
4. Step 4: Simplify right side
   42,105.90x = 791,203,084.07
5. Step 5: Solve for x
   x = 791,203,084.07/42,105.90
6. Step 6: Final answer
   x = 18,790.79