Finding the Fourth Proportional to 1,685.75, 2,326.39 and 1,055.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.75 : 2,326.39 = 1,055.81 : x
2. Step 2: Convert to fraction form
   1,685.75/2,326.39 = 1,055.81/x
3. Step 3: Cross multiply
   1,685.75x = 2,326.39 × 1,055.81
4. Step 4: Simplify right side
   1,685.75x = 2,456,229.00
5. Step 5: Solve for x
   x = 2,456,229.00/1,685.75
6. Step 6: Final answer
   x = 1,457.06