Finding the Fourth Proportional to 22,117.89, 30,525.48 and 12,686.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,117.89 : 30,525.48 = 12,686.25 : x
2. Step 2: Convert to fraction form
   22,117.89/30,525.48 = 12,686.25/x
3. Step 3: Cross multiply
   22,117.89x = 30,525.48 × 12,686.25
4. Step 4: Simplify right side
   22,117.89x = 387,253,870.65
5. Step 5: Solve for x
   x = 387,253,870.65/22,117.89
6. Step 6: Final answer
   x = 17,508.63