Finding the Fourth Proportional to 12,742.76, 17,584.78 and 7,077.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,742.76 : 17,584.78 = 7,077.52 : x
2. Step 2: Convert to fraction form
   12,742.76/17,584.78 = 7,077.52/x
3. Step 3: Cross multiply
   12,742.76x = 17,584.78 × 7,077.52
4. Step 4: Simplify right side
   12,742.76x = 124,456,632.15
5. Step 5: Solve for x
   x = 124,456,632.15/12,742.76
6. Step 6: Final answer
   x = 9,766.85