Finding the Third Proportional to 611.30 and 915.52

Step by Step Solution

1. Step 1: Write the proportion equation
   611.30 : 915.52 = 915.52 : x
2. Step 2: Convert to fraction form
   611.30/915.52 = 915.52/x
3. Step 3: Cross multiply
   611.30x = 915.52 × 915.52
4. Step 4: Simplify right side
   611.30x = 838,179.59
5. Step 5: Solve for x
   x = 838,179.59/611.30
6. Step 6: Final answer
   x = 1,371.15