Finding the Fourth Proportional to 31,026.52, 42,806.08 and 20,426.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,026.52 : 42,806.08 = 20,426.88 : x
2. Step 2: Convert to fraction form
   31,026.52/42,806.08 = 20,426.88/x
3. Step 3: Cross multiply
   31,026.52x = 42,806.08 × 20,426.88
4. Step 4: Simplify right side
   31,026.52x = 874,394,659.43
5. Step 5: Solve for x
   x = 874,394,659.43/31,026.52
6. Step 6: Final answer
   x = 28,182.17