Finding the Fourth Proportional to 10,986.93, 16,471.88 and 5,436.45

Step by Step Solution

1. Step 1: Write the proportion equation
   10,986.93 : 16,471.88 = 5,436.45 : x
2. Step 2: Convert to fraction form
   10,986.93/16,471.88 = 5,436.45/x
3. Step 3: Cross multiply
   10,986.93x = 16,471.88 × 5,436.45
4. Step 4: Simplify right side
   10,986.93x = 89,548,524.84
5. Step 5: Solve for x
   x = 89,548,524.84/10,986.93
6. Step 6: Final answer
   x = 8,150.46