Finding the Fourth Proportional to 17,800.78, 24,564.72 and 9,842.80

Step by Step Solution

1. Step 1: Write the proportion equation
   17,800.78 : 24,564.72 = 9,842.80 : x
2. Step 2: Convert to fraction form
   17,800.78/24,564.72 = 9,842.80/x
3. Step 3: Cross multiply
   17,800.78x = 24,564.72 × 9,842.80
4. Step 4: Simplify right side
   17,800.78x = 241,785,626.02
5. Step 5: Solve for x
   x = 241,785,626.02/17,800.78
6. Step 6: Final answer
   x = 13,582.87