Finding the Fourth Proportional to 1,725.05, 2,380.56 and 939.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,725.05 : 2,380.56 = 939.09 : x
2. Step 2: Convert to fraction form
   1,725.05/2,380.56 = 939.09/x
3. Step 3: Cross multiply
   1,725.05x = 2,380.56 × 939.09
4. Step 4: Simplify right side
   1,725.05x = 2,235,573.42
5. Step 5: Solve for x
   x = 2,235,573.42/1,725.05
6. Step 6: Final answer
   x = 1,295.95