Finding the Fourth Proportional to 42,168.31, 63,231.79 and 14,078.73

Step by Step Solution

1. Step 1: Write the proportion equation
   42,168.31 : 63,231.79 = 14,078.73 : x
2. Step 2: Convert to fraction form
   42,168.31/63,231.79 = 14,078.73/x
3. Step 3: Cross multiply
   42,168.31x = 63,231.79 × 14,078.73
4. Step 4: Simplify right side
   42,168.31x = 890,223,298.83
5. Step 5: Solve for x
   x = 890,223,298.83/42,168.31
6. Step 6: Final answer
   x = 21,111.19