Finding the Fourth Proportional to 8,559.57, 12,810.15 and 7,174.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,559.57 : 12,810.15 = 7,174.47 : x
2. Step 2: Convert to fraction form
   8,559.57/12,810.15 = 7,174.47/x
3. Step 3: Cross multiply
   8,559.57x = 12,810.15 × 7,174.47
4. Step 4: Simplify right side
   8,559.57x = 91,906,036.87
5. Step 5: Solve for x
   x = 91,906,036.87/8,559.57
6. Step 6: Final answer
   x = 10,737.23