Finding the Fourth Proportional to 8,499.18, 11,687.27 and 7,378.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.18 : 11,687.27 = 7,378.15 : x
2. Step 2: Convert to fraction form
   8,499.18/11,687.27 = 7,378.15/x
3. Step 3: Cross multiply
   8,499.18x = 11,687.27 × 7,378.15
4. Step 4: Simplify right side
   8,499.18x = 86,230,472.28
5. Step 5: Solve for x
   x = 86,230,472.28/8,499.18
6. Step 6: Final answer
   x = 10,145.74