Finding the Fourth Proportional to 22,463.12, 30,998.61 and 12,391.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,463.12 : 30,998.61 = 12,391.57 : x
2. Step 2: Convert to fraction form
   22,463.12/30,998.61 = 12,391.57/x
3. Step 3: Cross multiply
   22,463.12x = 30,998.61 × 12,391.57
4. Step 4: Simplify right side
   22,463.12x = 384,121,530.93
5. Step 5: Solve for x
   x = 384,121,530.93/22,463.12
6. Step 6: Final answer
   x = 17,100.10