Finding the Fourth Proportional to 22,118.10, 30,522.45 and 12,686.06

Step by Step Solution

1. Step 1: Write the proportion equation
   22,118.10 : 30,522.45 = 12,686.06 : x
2. Step 2: Convert to fraction form
   22,118.10/30,522.45 = 12,686.06/x
3. Step 3: Cross multiply
   22,118.10x = 30,522.45 × 12,686.06
4. Step 4: Simplify right side
   22,118.10x = 387,209,632.05
5. Step 5: Solve for x
   x = 387,209,632.05/22,118.10
6. Step 6: Final answer
   x = 17,506.46