Finding the Fourth Proportional to 10,986.53, 16,468.77 and 5,443.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,986.53 : 16,468.77 = 5,443.90 : x
2. Step 2: Convert to fraction form
   10,986.53/16,468.77 = 5,443.90/x
3. Step 3: Cross multiply
   10,986.53x = 16,468.77 × 5,443.90
4. Step 4: Simplify right side
   10,986.53x = 89,654,254.66
5. Step 5: Solve for x
   x = 89,654,254.66/10,986.53
6. Step 6: Final answer
   x = 8,160.38