Finding the Fourth Proportional to 1,815.69, 2,721.38 and 1,264.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.69 : 2,721.38 = 1,264.89 : x
2. Step 2: Convert to fraction form
   1,815.69/2,721.38 = 1,264.89/x
3. Step 3: Cross multiply
   1,815.69x = 2,721.38 × 1,264.89
4. Step 4: Simplify right side
   1,815.69x = 3,442,240.02
5. Step 5: Solve for x
   x = 3,442,240.02/1,815.69
6. Step 6: Final answer
   x = 1,895.83