Finding the Fourth Proportional to 22,239.57, 30,690.35 and 12,167.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,239.57 : 30,690.35 = 12,167.89 : x
2. Step 2: Convert to fraction form
   22,239.57/30,690.35 = 12,167.89/x
3. Step 3: Cross multiply
   22,239.57x = 30,690.35 × 12,167.89
4. Step 4: Simplify right side
   22,239.57x = 373,436,802.86
5. Step 5: Solve for x
   x = 373,436,802.86/22,239.57
6. Step 6: Final answer
   x = 16,791.55