Finding the Fourth Proportional to 2,870.79, 4,305.98 and 896.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.79 : 4,305.98 = 896.39 : x
2. Step 2: Convert to fraction form
   2,870.79/4,305.98 = 896.39/x
3. Step 3: Cross multiply
   2,870.79x = 4,305.98 × 896.39
4. Step 4: Simplify right side
   2,870.79x = 3,859,811.40
5. Step 5: Solve for x
   x = 3,859,811.40/2,870.79
6. Step 6: Final answer
   x = 1,344.51