Finding the Fourth Proportional to 12,607.47, 18,909.88 and 5,587.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,607.47 : 18,909.88 = 5,587.61 : x
2. Step 2: Convert to fraction form
   12,607.47/18,909.88 = 5,587.61/x
3. Step 3: Cross multiply
   12,607.47x = 18,909.88 × 5,587.61
4. Step 4: Simplify right side
   12,607.47x = 105,660,926.07
5. Step 5: Solve for x
   x = 105,660,926.07/12,607.47
6. Step 6: Final answer
   x = 8,380.82