Finding the Fourth Proportional to 2,180.62, 3,007.76 and 1,394.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.62 : 3,007.76 = 1,394.30 : x
2. Step 2: Convert to fraction form
   2,180.62/3,007.76 = 1,394.30/x
3. Step 3: Cross multiply
   2,180.62x = 3,007.76 × 1,394.30
4. Step 4: Simplify right side
   2,180.62x = 4,193,719.77
5. Step 5: Solve for x
   x = 4,193,719.77/2,180.62
6. Step 6: Final answer
   x = 1,923.18