Finding the Fourth Proportional to 42,007.25, 63,023.18 and 12,425.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.25 : 63,023.18 = 12,425.88 : x
2. Step 2: Convert to fraction form
   42,007.25/63,023.18 = 12,425.88/x
3. Step 3: Cross multiply
   42,007.25x = 63,023.18 × 12,425.88
4. Step 4: Simplify right side
   42,007.25x = 783,118,156.78
5. Step 5: Solve for x
   x = 783,118,156.78/42,007.25
6. Step 6: Final answer
   x = 18,642.45