Finding the Fourth Proportional to 31,101.06, 42,906.17 and 20,327.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,101.06 : 42,906.17 = 20,327.25 : x
2. Step 2: Convert to fraction form
   31,101.06/42,906.17 = 20,327.25/x
3. Step 3: Cross multiply
   31,101.06x = 42,906.17 × 20,327.25
4. Step 4: Simplify right side
   31,101.06x = 872,164,342.50
5. Step 5: Solve for x
   x = 872,164,342.50/31,101.06
6. Step 6: Final answer
   x = 28,042.91