Finding the Fourth Proportional to 42,149.88, 63,233.94 and 12,570.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,149.88 : 63,233.94 = 12,570.12 : x
2. Step 2: Convert to fraction form
   42,149.88/63,233.94 = 12,570.12/x
3. Step 3: Cross multiply
   42,149.88x = 63,233.94 × 12,570.12
4. Step 4: Simplify right side
   42,149.88x = 794,858,213.87
5. Step 5: Solve for x
   x = 794,858,213.87/42,149.88
6. Step 6: Final answer
   x = 18,857.90