Finding the Fourth Proportional to 15,978.85, 22,050.50 and 9,265.10

Step by Step Solution

1. Step 1: Write the proportion equation
   15,978.85 : 22,050.50 = 9,265.10 : x
2. Step 2: Convert to fraction form
   15,978.85/22,050.50 = 9,265.10/x
3. Step 3: Cross multiply
   15,978.85x = 22,050.50 × 9,265.10
4. Step 4: Simplify right side
   15,978.85x = 204,300,087.55
5. Step 5: Solve for x
   x = 204,300,087.55/15,978.85
6. Step 6: Final answer
   x = 12,785.66