Finding the Fourth Proportional to 1,458.50, 2,012.39 and 868.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,458.50 : 2,012.39 = 868.91 : x
2. Step 2: Convert to fraction form
   1,458.50/2,012.39 = 868.91/x
3. Step 3: Cross multiply
   1,458.50x = 2,012.39 × 868.91
4. Step 4: Simplify right side
   1,458.50x = 1,748,571.39
5. Step 5: Solve for x
   x = 1,748,571.39/1,458.50
6. Step 6: Final answer
   x = 1,198.89