Finding the Fourth Proportional to 2,178.29, 3,007.59 and 1,340.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.29 : 3,007.59 = 1,340.12 : x
2. Step 2: Convert to fraction form
   2,178.29/3,007.59 = 1,340.12/x
3. Step 3: Cross multiply
   2,178.29x = 3,007.59 × 1,340.12
4. Step 4: Simplify right side
   2,178.29x = 4,030,516.47
5. Step 5: Solve for x
   x = 4,030,516.47/2,178.29
6. Step 6: Final answer
   x = 1,850.32