Finding the Fourth Proportional to 12,656.39, 17,458.89 and 7,617.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,656.39 : 17,458.89 = 7,617.57 : x
2. Step 2: Convert to fraction form
   12,656.39/17,458.89 = 7,617.57/x
3. Step 3: Cross multiply
   12,656.39x = 17,458.89 × 7,617.57
4. Step 4: Simplify right side
   12,656.39x = 132,994,316.70
5. Step 5: Solve for x
   x = 132,994,316.70/12,656.39
6. Step 6: Final answer
   x = 10,508.08