Finding the Fourth Proportional to 10,618.40, 14,655.20 and 6,144.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,618.40 : 14,655.20 = 6,144.89 : x
2. Step 2: Convert to fraction form
   10,618.40/14,655.20 = 6,144.89/x
3. Step 3: Cross multiply
   10,618.40x = 14,655.20 × 6,144.89
4. Step 4: Simplify right side
   10,618.40x = 90,054,487.93
5. Step 5: Solve for x
   x = 90,054,487.93/10,618.40
6. Step 6: Final answer
   x = 8,480.99