Finding the Fourth Proportional to 1,725.78, 2,381.58 and 939.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,725.78 : 2,381.58 = 939.82 : x
2. Step 2: Convert to fraction form
   1,725.78/2,381.58 = 939.82/x
3. Step 3: Cross multiply
   1,725.78x = 2,381.58 × 939.82
4. Step 4: Simplify right side
   1,725.78x = 2,238,256.52
5. Step 5: Solve for x
   x = 2,238,256.52/1,725.78
6. Step 6: Final answer
   x = 1,296.95