Finding the Fourth Proportional to 10,978.74, 16,469.93 and 5,432.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.74 : 16,469.93 = 5,432.27 : x
2. Step 2: Convert to fraction form
   10,978.74/16,469.93 = 5,432.27/x
3. Step 3: Cross multiply
   10,978.74x = 16,469.93 × 5,432.27
4. Step 4: Simplify right side
   10,978.74x = 89,469,037.87
5. Step 5: Solve for x
   x = 89,469,037.87/10,978.74
6. Step 6: Final answer
   x = 8,149.30