Finding the Fourth Proportional to 22,988.84, 31,722.89 and 12,915.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,988.84 : 31,722.89 = 12,915.34 : x
2. Step 2: Convert to fraction form
   22,988.84/31,722.89 = 12,915.34/x
3. Step 3: Cross multiply
   22,988.84x = 31,722.89 × 12,915.34
4. Step 4: Simplify right side
   22,988.84x = 409,711,766.25
5. Step 5: Solve for x
   x = 409,711,766.25/22,988.84
6. Step 6: Final answer
   x = 17,822.21