Finding the Fourth Proportional to 17,775.60, 24,540.72 and 15,807.12

Step by Step Solution

1. Step 1: Write the proportion equation
   17,775.60 : 24,540.72 = 15,807.12 : x
2. Step 2: Convert to fraction form
   17,775.60/24,540.72 = 15,807.12/x
3. Step 3: Cross multiply
   17,775.60x = 24,540.72 × 15,807.12
4. Step 4: Simplify right side
   17,775.60x = 387,918,105.93
5. Step 5: Solve for x
   x = 387,918,105.93/17,775.60
6. Step 6: Final answer
   x = 21,823.07