Finding the Fourth Proportional to 2,671.32, 4,007.31 and 916.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,671.32 : 4,007.31 = 916.65 : x
2. Step 2: Convert to fraction form
   2,671.32/4,007.31 = 916.65/x
3. Step 3: Cross multiply
   2,671.32x = 4,007.31 × 916.65
4. Step 4: Simplify right side
   2,671.32x = 3,673,300.71
5. Step 5: Solve for x
   x = 3,673,300.71/2,671.32
6. Step 6: Final answer
   x = 1,375.09