Finding the Fourth Proportional to 31,032.42, 42,818.20 and 20,293.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,032.42 : 42,818.20 = 20,293.04 : x
2. Step 2: Convert to fraction form
   31,032.42/42,818.20 = 20,293.04/x
3. Step 3: Cross multiply
   31,032.42x = 42,818.20 × 20,293.04
4. Step 4: Simplify right side
   31,032.42x = 868,911,445.33
5. Step 5: Solve for x
   x = 868,911,445.33/31,032.42
6. Step 6: Final answer
   x = 28,000.12