Finding the Fourth Proportional to 12,155.38, 16,782.17 and 9,922.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155.38 : 16,782.17 = 9,922.57 : x
2. Step 2: Convert to fraction form
   12,155.38/16,782.17 = 9,922.57/x
3. Step 3: Cross multiply
   12,155.38x = 16,782.17 × 9,922.57
4. Step 4: Simplify right side
   12,155.38x = 166,522,165.01
5. Step 5: Solve for x
   x = 166,522,165.01/12,155.38
6. Step 6: Final answer
   x = 13,699.46