Finding the Fourth Proportional to 1,685.16, 2,325.51 and 939.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.16 : 2,325.51 = 939.15 : x
2. Step 2: Convert to fraction form
   1,685.16/2,325.51 = 939.15/x
3. Step 3: Cross multiply
   1,685.16x = 2,325.51 × 939.15
4. Step 4: Simplify right side
   1,685.16x = 2,184,002.72
5. Step 5: Solve for x
   x = 2,184,002.72/1,685.16
6. Step 6: Final answer
   x = 1,296.02