Finding the Fourth Proportional to 22,118.16, 30,522.78 and 12,686.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,118.16 : 30,522.78 = 12,686.52 : x
2. Step 2: Convert to fraction form
   22,118.16/30,522.78 = 12,686.52/x
3. Step 3: Cross multiply
   22,118.16x = 30,522.78 × 12,686.52
4. Step 4: Simplify right side
   22,118.16x = 387,227,858.93
5. Step 5: Solve for x
   x = 387,227,858.93/22,118.16
6. Step 6: Final answer
   x = 17,507.24