Finding the Fourth Proportional to 42,315.52, 63,425.76 and 20,110.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,315.52 : 63,425.76 = 20,110.72 : x
2. Step 2: Convert to fraction form
   42,315.52/63,425.76 = 20,110.72/x
3. Step 3: Cross multiply
   42,315.52x = 63,425.76 × 20,110.72
4. Step 4: Simplify right side
   42,315.52x = 1,275,537,700.15
5. Step 5: Solve for x
   x = 1,275,537,700.15/42,315.52
6. Step 6: Final answer
   x = 30,143.50