Finding the Fourth Proportional to 1,488.38, 2,230.31 and 1,178.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.38 : 2,230.31 = 1,178.94 : x
2. Step 2: Convert to fraction form
   1,488.38/2,230.31 = 1,178.94/x
3. Step 3: Cross multiply
   1,488.38x = 2,230.31 × 1,178.94
4. Step 4: Simplify right side
   1,488.38x = 2,629,401.67
5. Step 5: Solve for x
   x = 2,629,401.67/1,488.38
6. Step 6: Final answer
   x = 1,766.62