Finding the Fourth Proportional to 915.41, 1,372.50 and 760.70

Step by Step Solution

1. Step 1: Write the proportion equation
   915.41 : 1,372.50 = 760.70 : x
2. Step 2: Convert to fraction form
   915.41/1,372.50 = 760.70/x
3. Step 3: Cross multiply
   915.41x = 1,372.50 × 760.70
4. Step 4: Simplify right side
   915.41x = 1,044,053.89
5. Step 5: Solve for x
   x = 1,044,053.89/915.41
6. Step 6: Final answer
   x = 1,140.54