Finding the Fourth Proportional to 10,256.18, 14,153.49 and 5,540.45

Step by Step Solution

1. Step 1: Write the proportion equation
   10,256.18 : 14,153.49 = 5,540.45 : x
2. Step 2: Convert to fraction form
   10,256.18/14,153.49 = 5,540.45/x
3. Step 3: Cross multiply
   10,256.18x = 14,153.49 × 5,540.45
4. Step 4: Simplify right side
   10,256.18x = 78,416,632.90
5. Step 5: Solve for x
   x = 78,416,632.90/10,256.18
6. Step 6: Final answer
   x = 7,645.80