Finding the Fourth Proportional to 1,358.67, 1,876.52 and 915.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.67 : 1,876.52 = 915.81 : x
2. Step 2: Convert to fraction form
   1,358.67/1,876.52 = 915.81/x
3. Step 3: Cross multiply
   1,358.67x = 1,876.52 × 915.81
4. Step 4: Simplify right side
   1,358.67x = 1,718,535.78
5. Step 5: Solve for x
   x = 1,718,535.78/1,358.67
6. Step 6: Final answer
   x = 1,264.87