Finding the Fourth Proportional to 31,350.96, 47,042.56 and 20,828.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,350.96 : 47,042.56 = 20,828.25 : x
2. Step 2: Convert to fraction form
   31,350.96/47,042.56 = 20,828.25/x
3. Step 3: Cross multiply
   31,350.96x = 47,042.56 × 20,828.25
4. Step 4: Simplify right side
   31,350.96x = 979,814,200.32
5. Step 5: Solve for x
   x = 979,814,200.32/31,350.96
6. Step 6: Final answer
   x = 31,253.08