Finding the Fourth Proportional to 22,759.78, 31,404.67 and 12,686.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,759.78 : 31,404.67 = 12,686.02 : x
2. Step 2: Convert to fraction form
   22,759.78/31,404.67 = 12,686.02/x
3. Step 3: Cross multiply
   22,759.78x = 31,404.67 × 12,686.02
4. Step 4: Simplify right side
   22,759.78x = 398,400,271.71
5. Step 5: Solve for x
   x = 398,400,271.71/22,759.78
6. Step 6: Final answer
   x = 17,504.57