Finding the Fourth Proportional to 8,478.86, 11,708.43 and 5,499.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,478.86 : 11,708.43 = 5,499.50 : x
2. Step 2: Convert to fraction form
   8,478.86/11,708.43 = 5,499.50/x
3. Step 3: Cross multiply
   8,478.86x = 11,708.43 × 5,499.50
4. Step 4: Simplify right side
   8,478.86x = 64,390,510.79
5. Step 5: Solve for x
   x = 64,390,510.79/8,478.86
6. Step 6: Final answer
   x = 7,594.24