Finding the Fourth Proportional to 10,985.68, 16,479.29 and 4,411.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.68 : 16,479.29 = 4,411.86 : x
2. Step 2: Convert to fraction form
   10,985.68/16,479.29 = 4,411.86/x
3. Step 3: Cross multiply
   10,985.68x = 16,479.29 × 4,411.86
4. Step 4: Simplify right side
   10,985.68x = 72,704,354.46
5. Step 5: Solve for x
   x = 72,704,354.46/10,985.68
6. Step 6: Final answer
   x = 6,618.10