Finding the Fourth Proportional to 2,114.91, 2,918.78 and 1,230.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.91 : 2,918.78 = 1,230.71 : x
2. Step 2: Convert to fraction form
   2,114.91/2,918.78 = 1,230.71/x
3. Step 3: Cross multiply
   2,114.91x = 2,918.78 × 1,230.71
4. Step 4: Simplify right side
   2,114.91x = 3,592,150.99
5. Step 5: Solve for x
   x = 3,592,150.99/2,114.91
6. Step 6: Final answer
   x = 1,698.49