Finding the Fourth Proportional to 42,656.08, 63,923.98 and 20,142.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,656.08 : 63,923.98 = 20,142.74 : x
2. Step 2: Convert to fraction form
   42,656.08/63,923.98 = 20,142.74/x
3. Step 3: Cross multiply
   42,656.08x = 63,923.98 × 20,142.74
4. Step 4: Simplify right side
   42,656.08x = 1,287,604,108.91
5. Step 5: Solve for x
   x = 1,287,604,108.91/42,656.08
6. Step 6: Final answer
   x = 30,185.71