Finding the Fourth Proportional to 8,939.01, 12,343.67 and 5,587.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,939.01 : 12,343.67 = 5,587.55 : x
2. Step 2: Convert to fraction form
   8,939.01/12,343.67 = 5,587.55/x
3. Step 3: Cross multiply
   8,939.01x = 12,343.67 × 5,587.55
4. Step 4: Simplify right side
   8,939.01x = 68,970,873.31
5. Step 5: Solve for x
   x = 68,970,873.31/8,939.01
6. Step 6: Final answer
   x = 7,715.72