Finding the Fourth Proportional to 31,130.88, 42,909.38 and 22,059.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,130.88 : 42,909.38 = 22,059.28 : x
2. Step 2: Convert to fraction form
   31,130.88/42,909.38 = 22,059.28/x
3. Step 3: Cross multiply
   31,130.88x = 42,909.38 × 22,059.28
4. Step 4: Simplify right side
   31,130.88x = 946,550,028.05
5. Step 5: Solve for x
   x = 946,550,028.05/31,130.88
6. Step 6: Final answer
   x = 30,405.50