Finding the Fourth Proportional to 1,489.57, 2,056.08 and 868.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.57 : 2,056.08 = 868.69 : x
2. Step 2: Convert to fraction form
   1,489.57/2,056.08 = 868.69/x
3. Step 3: Cross multiply
   1,489.57x = 2,056.08 × 868.69
4. Step 4: Simplify right side
   1,489.57x = 1,786,096.14
5. Step 5: Solve for x
   x = 1,786,096.14/1,489.57
6. Step 6: Final answer
   x = 1,199.07