Finding the Fourth Proportional to 10,986.30, 16,468.65 and 5,435.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,986.30 : 16,468.65 = 5,435.10 : x
2. Step 2: Convert to fraction form
   10,986.30/16,468.65 = 5,435.10/x
3. Step 3: Cross multiply
   10,986.30x = 16,468.65 × 5,435.10
4. Step 4: Simplify right side
   10,986.30x = 89,508,759.62
5. Step 5: Solve for x
   x = 89,508,759.62/10,986.30
6. Step 6: Final answer
   x = 8,147.31