Finding the Fourth Proportional to 12,699.60, 17,524.89 and 7,394.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,699.60 : 17,524.89 = 7,394.10 : x
2. Step 2: Convert to fraction form
   12,699.60/17,524.89 = 7,394.10/x
3. Step 3: Cross multiply
   12,699.60x = 17,524.89 × 7,394.10
4. Step 4: Simplify right side
   12,699.60x = 129,580,789.15
5. Step 5: Solve for x
   x = 129,580,789.15/12,699.60
6. Step 6: Final answer
   x = 10,203.53