Finding the Fourth Proportional to 1,046.32, 1,568.16 and 916

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.32 : 1,568.16 = 916 : x
2. Step 2: Convert to fraction form
   1,046.32/1,568.16 = 916/x
3. Step 3: Cross multiply
   1,046.32x = 1,568.16 × 916
4. Step 4: Simplify right side
   1,046.32x = 1,436,434.56
5. Step 5: Solve for x
   x = 1,436,434.56/1,046.32
6. Step 6: Final answer
   x = 1,372.84