Finding the Fourth Proportional to 1,391.32, 1,919.96 and 832.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.32 : 1,919.96 = 832.10 : x
2. Step 2: Convert to fraction form
   1,391.32/1,919.96 = 832.10/x
3. Step 3: Cross multiply
   1,391.32x = 1,919.96 × 832.10
4. Step 4: Simplify right side
   1,391.32x = 1,597,598.41
5. Step 5: Solve for x
   x = 1,597,598.41/1,391.32
6. Step 6: Final answer
   x = 1,148.26