Finding the Fourth Proportional to 1,685.30, 2,325.89 and 939.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.30 : 2,325.89 = 939.38 : x
2. Step 2: Convert to fraction form
   1,685.30/2,325.89 = 939.38/x
3. Step 3: Cross multiply
   1,685.30x = 2,325.89 × 939.38
4. Step 4: Simplify right side
   1,685.30x = 2,184,894.55
5. Step 5: Solve for x
   x = 2,184,894.55/1,685.30
6. Step 6: Final answer
   x = 1,296.44