Finding the Fourth Proportional to 8,561.40, 12,820.18 and 5,925.26

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561.40 : 12,820.18 = 5,925.26 : x
2. Step 2: Convert to fraction form
   8,561.40/12,820.18 = 5,925.26/x
3. Step 3: Cross multiply
   8,561.40x = 12,820.18 × 5,925.26
4. Step 4: Simplify right side
   8,561.40x = 75,962,899.75
5. Step 5: Solve for x
   x = 75,962,899.75/8,561.40
6. Step 6: Final answer
   x = 8,872.72