Finding the Fourth Proportional to 31,013.49, 42,780.55 and 22,505.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,013.49 : 42,780.55 = 22,505.72 : x
2. Step 2: Convert to fraction form
   31,013.49/42,780.55 = 22,505.72/x
3. Step 3: Cross multiply
   31,013.49x = 42,780.55 × 22,505.72
4. Step 4: Simplify right side
   31,013.49x = 962,806,970.01
5. Step 5: Solve for x
   x = 962,806,970.01/31,013.49
6. Step 6: Final answer
   x = 31,044.78