Finding the Fourth Proportional to 16,486.80, 22,759.67 and 9,411.86

Step by Step Solution

1. Step 1: Write the proportion equation
   16,486.80 : 22,759.67 = 9,411.86 : x
2. Step 2: Convert to fraction form
   16,486.80/22,759.67 = 9,411.86/x
3. Step 3: Cross multiply
   16,486.80x = 22,759.67 × 9,411.86
4. Step 4: Simplify right side
   16,486.80x = 214,210,666.83
5. Step 5: Solve for x
   x = 214,210,666.83/16,486.80
6. Step 6: Final answer
   x = 12,992.86