Finding the Fourth Proportional to 8,499.12, 12,737.70 and 6,290.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.12 : 12,737.70 = 6,290.25 : x
2. Step 2: Convert to fraction form
   8,499.12/12,737.70 = 6,290.25/x
3. Step 3: Cross multiply
   8,499.12x = 12,737.70 × 6,290.25
4. Step 4: Simplify right side
   8,499.12x = 80,123,317.43
5. Step 5: Solve for x
   x = 80,123,317.43/8,499.12
6. Step 6: Final answer
   x = 9,427.25