Finding the Fourth Proportional to 9,167.50, 12,654.03 and 5,440.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,167.50 : 12,654.03 = 5,440.78 : x
2. Step 2: Convert to fraction form
   9,167.50/12,654.03 = 5,440.78/x
3. Step 3: Cross multiply
   9,167.50x = 12,654.03 × 5,440.78
4. Step 4: Simplify right side
   9,167.50x = 68,847,793.34
5. Step 5: Solve for x
   x = 68,847,793.34/9,167.50
6. Step 6: Final answer
   x = 7,509.99