Finding the Fourth Proportional to 31,131.88, 42,910.76 and 22,060.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,131.88 : 42,910.76 = 22,060.28 : x
2. Step 2: Convert to fraction form
   31,131.88/42,910.76 = 22,060.28/x
3. Step 3: Cross multiply
   31,131.88x = 42,910.76 × 22,060.28
4. Step 4: Simplify right side
   31,131.88x = 946,623,380.61
5. Step 5: Solve for x
   x = 946,623,380.61/31,131.88
6. Step 6: Final answer
   x = 30,406.88