Finding the Fourth Proportional to 10,915.60, 16,377.72 and 7,217.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,915.60 : 16,377.72 = 7,217.04 : x
2. Step 2: Convert to fraction form
   10,915.60/16,377.72 = 7,217.04/x
3. Step 3: Cross multiply
   10,915.60x = 16,377.72 × 7,217.04
4. Step 4: Simplify right side
   10,915.60x = 118,198,660.35
5. Step 5: Solve for x
   x = 118,198,660.35/10,915.60
6. Step 6: Final answer
   x = 10,828.42