Finding the Fourth Proportional to 8,987.57, 12,402.76 and 5,008.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,987.57 : 12,402.76 = 5,008.61 : x
2. Step 2: Convert to fraction form
   8,987.57/12,402.76 = 5,008.61/x
3. Step 3: Cross multiply
   8,987.57x = 12,402.76 × 5,008.61
4. Step 4: Simplify right side
   8,987.57x = 62,120,587.76
5. Step 5: Solve for x
   x = 62,120,587.76/8,987.57
6. Step 6: Final answer
   x = 6,911.83