Finding the Fourth Proportional to 1,357.90, 1,874.54 and 916.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.90 : 1,874.54 = 916.52 : x
2. Step 2: Convert to fraction form
   1,357.90/1,874.54 = 916.52/x
3. Step 3: Cross multiply
   1,357.90x = 1,874.54 × 916.52
4. Step 4: Simplify right side
   1,357.90x = 1,718,046.32
5. Step 5: Solve for x
   x = 1,718,046.32/1,357.90
6. Step 6: Final answer
   x = 1,265.23