Finding the Fourth Proportional to 42,347.52, 63,473.76 and 20,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,347.52 : 63,473.76 = 20,142.72 : x
2. Step 2: Convert to fraction form
   42,347.52/63,473.76 = 20,142.72/x
3. Step 3: Cross multiply
   42,347.52x = 63,473.76 × 20,142.72
4. Step 4: Simplify right side
   42,347.52x = 1,278,534,175.03
5. Step 5: Solve for x
   x = 1,278,534,175.03/42,347.52
6. Step 6: Final answer
   x = 30,191.48