Finding the Fourth Proportional to 22,987.98, 31,722.71 and 12,916.17

Step by Step Solution

1. Step 1: Write the proportion equation
   22,987.98 : 31,722.71 = 12,916.17 : x
2. Step 2: Convert to fraction form
   22,987.98/31,722.71 = 12,916.17/x
3. Step 3: Cross multiply
   22,987.98x = 31,722.71 × 12,916.17
4. Step 4: Simplify right side
   22,987.98x = 409,735,850.64
5. Step 5: Solve for x
   x = 409,735,850.64/22,987.98
6. Step 6: Final answer
   x = 17,823.92