Finding the Fourth Proportional to 8,502.78, 11,704.72 and 7,377.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,502.78 : 11,704.72 = 7,377.10 : x
2. Step 2: Convert to fraction form
   8,502.78/11,704.72 = 7,377.10/x
3. Step 3: Cross multiply
   8,502.78x = 11,704.72 × 7,377.10
4. Step 4: Simplify right side
   8,502.78x = 86,346,889.91
5. Step 5: Solve for x
   x = 86,346,889.91/8,502.78
6. Step 6: Final answer
   x = 10,155.14