Finding the Fourth Proportional to 16,779.50, 23,155.88 and 9,225.65

Step by Step Solution

1. Step 1: Write the proportion equation
   16,779.50 : 23,155.88 = 9,225.65 : x
2. Step 2: Convert to fraction form
   16,779.50/23,155.88 = 9,225.65/x
3. Step 3: Cross multiply
   16,779.50x = 23,155.88 × 9,225.65
4. Step 4: Simplify right side
   16,779.50x = 213,627,925.83
5. Step 5: Solve for x
   x = 213,627,925.83/16,779.50
6. Step 6: Final answer
   x = 12,731.48