Finding the Fourth Proportional to 12,621.30, 17,418.69 and 7,587.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,621.30 : 17,418.69 = 7,587.15 : x
2. Step 2: Convert to fraction form
   12,621.30/17,418.69 = 7,587.15/x
3. Step 3: Cross multiply
   12,621.30x = 17,418.69 × 7,587.15
4. Step 4: Simplify right side
   12,621.30x = 132,158,213.83
5. Step 5: Solve for x
   x = 132,158,213.83/12,621.30
6. Step 6: Final answer
   x = 10,471.05