Finding the Fourth Proportional to 1,335.32, 1,842.60 and 916.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.32 : 1,842.60 = 916.03 : x
2. Step 2: Convert to fraction form
   1,335.32/1,842.60 = 916.03/x
3. Step 3: Cross multiply
   1,335.32x = 1,842.60 × 916.03
4. Step 4: Simplify right side
   1,335.32x = 1,687,872.27
5. Step 5: Solve for x
   x = 1,687,872.27/1,335.32
6. Step 6: Final answer
   x = 1,264.03