Finding the Fourth Proportional to 12,744.69, 17,587.58 and 7,155.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,744.69 : 17,587.58 = 7,155.69 : x
2. Step 2: Convert to fraction form
   12,744.69/17,587.58 = 7,155.69/x
3. Step 3: Cross multiply
   12,744.69x = 17,587.58 × 7,155.69
4. Step 4: Simplify right side
   12,744.69x = 125,851,234.55
5. Step 5: Solve for x
   x = 125,851,234.55/12,744.69
6. Step 6: Final answer
   x = 9,874.80