Finding the Fourth Proportional to 13,760.47, 20,650.43 and 5,440.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,760.47 : 20,650.43 = 5,440.76 : x
2. Step 2: Convert to fraction form
   13,760.47/20,650.43 = 5,440.76/x
3. Step 3: Cross multiply
   13,760.47x = 20,650.43 × 5,440.76
4. Step 4: Simplify right side
   13,760.47x = 112,354,033.53
5. Step 5: Solve for x
   x = 112,354,033.53/13,760.47
6. Step 6: Final answer
   x = 8,164.99