Finding the Fourth Proportional to 1,488.39, 2,230.89 and 756.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.39 : 2,230.89 = 756.42 : x
2. Step 2: Convert to fraction form
   1,488.39/2,230.89 = 756.42/x
3. Step 3: Cross multiply
   1,488.39x = 2,230.89 × 756.42
4. Step 4: Simplify right side
   1,488.39x = 1,687,489.81
5. Step 5: Solve for x
   x = 1,687,489.81/1,488.39
6. Step 6: Final answer
   x = 1,133.77