Finding the Fourth Proportional to 2,326.61, 3,210.71 and 1,278.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,326.61 : 3,210.71 = 1,278.65 : x
2. Step 2: Convert to fraction form
   2,326.61/3,210.71 = 1,278.65/x
3. Step 3: Cross multiply
   2,326.61x = 3,210.71 × 1,278.65
4. Step 4: Simplify right side
   2,326.61x = 4,105,351.89
5. Step 5: Solve for x
   x = 4,105,351.89/2,326.61
6. Step 6: Final answer
   x = 1,764.52