Finding the Fourth Proportional to 31,156.85, 42,996.15 and 19,215.41

Step by Step Solution

1. Step 1: Write the proportion equation
   31,156.85 : 42,996.15 = 19,215.41 : x
2. Step 2: Convert to fraction form
   31,156.85/42,996.15 = 19,215.41/x
3. Step 3: Cross multiply
   31,156.85x = 42,996.15 × 19,215.41
4. Step 4: Simplify right side
   31,156.85x = 826,188,650.67
5. Step 5: Solve for x
   x = 826,188,650.67/31,156.85
6. Step 6: Final answer
   x = 26,517.08