Finding the Fourth Proportional to 31,078.56, 42,886.72 and 17,649.48

Step by Step Solution

1. Step 1: Write the proportion equation
   31,078.56 : 42,886.72 = 17,649.48 : x
2. Step 2: Convert to fraction form
   31,078.56/42,886.72 = 17,649.48/x
3. Step 3: Cross multiply
   31,078.56x = 42,886.72 × 17,649.48
4. Step 4: Simplify right side
   31,078.56x = 756,928,306.91
5. Step 5: Solve for x
   x = 756,928,306.91/31,078.56
6. Step 6: Final answer
   x = 24,355.32