Finding the Fourth Proportional to 10,978.29, 16,467.21 and 4,405.95

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.29 : 16,467.21 = 4,405.95 : x
2. Step 2: Convert to fraction form
   10,978.29/16,467.21 = 4,405.95/x
3. Step 3: Cross multiply
   10,978.29x = 16,467.21 × 4,405.95
4. Step 4: Simplify right side
   10,978.29x = 72,553,703.90
5. Step 5: Solve for x
   x = 72,553,703.90/10,978.29
6. Step 6: Final answer
   x = 6,608.83