Finding the Fourth Proportional to 16,479.86, 22,742.78 and 9,406.13

Step by Step Solution

1. Step 1: Write the proportion equation
   16,479.86 : 22,742.78 = 9,406.13 : x
2. Step 2: Convert to fraction form
   16,479.86/22,742.78 = 9,406.13/x
3. Step 3: Cross multiply
   16,479.86x = 22,742.78 × 9,406.13
4. Step 4: Simplify right side
   16,479.86x = 213,921,384.50
5. Step 5: Solve for x
   x = 213,921,384.50/16,479.86
6. Step 6: Final answer
   x = 12,980.78