Finding the Fourth Proportional to 2,128.66, 3,191.03 and 896.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.66 : 3,191.03 = 896.15 : x
2. Step 2: Convert to fraction form
   2,128.66/3,191.03 = 896.15/x
3. Step 3: Cross multiply
   2,128.66x = 3,191.03 × 896.15
4. Step 4: Simplify right side
   2,128.66x = 2,859,651.75
5. Step 5: Solve for x
   x = 2,859,651.75/2,128.66
6. Step 6: Final answer
   x = 1,343.41