Finding the Fourth Proportional to 1,685.47, 2,326.01 and 939.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.47 : 2,326.01 = 939.59 : x
2. Step 2: Convert to fraction form
   1,685.47/2,326.01 = 939.59/x
3. Step 3: Cross multiply
   1,685.47x = 2,326.01 × 939.59
4. Step 4: Simplify right side
   1,685.47x = 2,185,488.13
5. Step 5: Solve for x
   x = 2,185,488.13/1,685.47
6. Step 6: Final answer
   x = 1,296.66