Finding the Fourth Proportional to 22,462.29, 30,998.32 and 12,390.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,462.29 : 30,998.32 = 12,390.55 : x
2. Step 2: Convert to fraction form
   22,462.29/30,998.32 = 12,390.55/x
3. Step 3: Cross multiply
   22,462.29x = 30,998.32 × 12,390.55
4. Step 4: Simplify right side
   22,462.29x = 384,086,233.88
5. Step 5: Solve for x
   x = 384,086,233.88/22,462.29
6. Step 6: Final answer
   x = 17,099.16