Finding the Fourth Proportional to 17,728.30, 24,465.20 and 9,770.55

Step by Step Solution

1. Step 1: Write the proportion equation
   17,728.30 : 24,465.20 = 9,770.55 : x
2. Step 2: Convert to fraction form
   17,728.30/24,465.20 = 9,770.55/x
3. Step 3: Cross multiply
   17,728.30x = 24,465.20 × 9,770.55
4. Step 4: Simplify right side
   17,728.30x = 239,038,459.86
5. Step 5: Solve for x
   x = 239,038,459.86/17,728.30
6. Step 6: Final answer
   x = 13,483.44