Finding the Fourth Proportional to 12,772.80, 17,650.56 and 9,623.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,772.80 : 17,650.56 = 9,623.52 : x
2. Step 2: Convert to fraction form
   12,772.80/17,650.56 = 9,623.52/x
3. Step 3: Cross multiply
   12,772.80x = 17,650.56 × 9,623.52
4. Step 4: Simplify right side
   12,772.80x = 169,860,517.17
5. Step 5: Solve for x
   x = 169,860,517.17/12,772.80
6. Step 6: Final answer
   x = 13,298.61