Finding the Fourth Proportional to 22,546.96, 31,111.32 and 12,987.27

Step by Step Solution

1. Step 1: Write the proportion equation
   22,546.96 : 31,111.32 = 12,987.27 : x
2. Step 2: Convert to fraction form
   22,546.96/31,111.32 = 12,987.27/x
3. Step 3: Cross multiply
   22,546.96x = 31,111.32 × 12,987.27
4. Step 4: Simplify right side
   22,546.96x = 404,051,161.60
5. Step 5: Solve for x
   x = 404,051,161.60/22,546.96
6. Step 6: Final answer
   x = 17,920.43