Finding the Fourth Proportional to 17,840.72, 24,620.88 and 9,882.78

Step by Step Solution

1. Step 1: Write the proportion equation
   17,840.72 : 24,620.88 = 9,882.78 : x
2. Step 2: Convert to fraction form
   17,840.72/24,620.88 = 9,882.78/x
3. Step 3: Cross multiply
   17,840.72x = 24,620.88 × 9,882.78
4. Step 4: Simplify right side
   17,840.72x = 243,322,740.45
5. Step 5: Solve for x
   x = 243,322,740.45/17,840.72
6. Step 6: Final answer
   x = 13,638.62