Finding the Fourth Proportional to 22,469.55, 31,007.79 and 12,398.09

Step by Step Solution

1. Step 1: Write the proportion equation
   22,469.55 : 31,007.79 = 12,398.09 : x
2. Step 2: Convert to fraction form
   22,469.55/31,007.79 = 12,398.09/x
3. Step 3: Cross multiply
   22,469.55x = 31,007.79 × 12,398.09
4. Step 4: Simplify right side
   22,469.55x = 384,437,268.42
5. Step 5: Solve for x
   x = 384,437,268.42/22,469.55
6. Step 6: Final answer
   x = 17,109.25