Finding the Fourth Proportional to 22,544.50, 31,111.70 and 12,986.06

Step by Step Solution

1. Step 1: Write the proportion equation
   22,544.50 : 31,111.70 = 12,986.06 : x
2. Step 2: Convert to fraction form
   22,544.50/31,111.70 = 12,986.06/x
3. Step 3: Cross multiply
   22,544.50x = 31,111.70 × 12,986.06
4. Step 4: Simplify right side
   22,544.50x = 404,018,402.90
5. Step 5: Solve for x
   x = 404,018,402.90/22,544.50
6. Step 6: Final answer
   x = 17,920.93