Finding the Fourth Proportional to 31,078.62, 42,886.94 and 17,648.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,078.62 : 42,886.94 = 17,648.15 : x
2. Step 2: Convert to fraction form
   31,078.62/42,886.94 = 17,648.15/x
3. Step 3: Cross multiply
   31,078.62x = 42,886.94 × 17,648.15
4. Step 4: Simplify right side
   31,078.62x = 756,874,847.49
5. Step 5: Solve for x
   x = 756,874,847.49/31,078.62
6. Step 6: Final answer
   x = 24,353.55