Finding the Fourth Proportional to 1,300.85, 1,949.12 and 915.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.85 : 1,949.12 = 915.29 : x
2. Step 2: Convert to fraction form
   1,300.85/1,949.12 = 915.29/x
3. Step 3: Cross multiply
   1,300.85x = 1,949.12 × 915.29
4. Step 4: Simplify right side
   1,300.85x = 1,784,005.47
5. Step 5: Solve for x
   x = 1,784,005.47/1,300.85
6. Step 6: Final answer
   x = 1,371.42