Finding the Fourth Proportional to 1,439.69, 2,155.37 and 844.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.69 : 2,155.37 = 844.91 : x
2. Step 2: Convert to fraction form
   1,439.69/2,155.37 = 844.91/x
3. Step 3: Cross multiply
   1,439.69x = 2,155.37 × 844.91
4. Step 4: Simplify right side
   1,439.69x = 1,821,085.00
5. Step 5: Solve for x
   x = 1,821,085.00/1,439.69
6. Step 6: Final answer
   x = 1,264.92