Finding the Fourth Proportional to 12,580.56, 17,345.16 and 7,863.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,580.56 : 17,345.16 = 7,863.12 : x
2. Step 2: Convert to fraction form
   12,580.56/17,345.16 = 7,863.12/x
3. Step 3: Cross multiply
   12,580.56x = 17,345.16 × 7,863.12
4. Step 4: Simplify right side
   12,580.56x = 136,387,074.50
5. Step 5: Solve for x
   x = 136,387,074.50/12,580.56
6. Step 6: Final answer
   x = 10,841.10