Finding the Fourth Proportional to 1,725.72, 2,381.46 and 939.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,725.72 : 2,381.46 = 939.74 : x
2. Step 2: Convert to fraction form
   1,725.72/2,381.46 = 939.74/x
3. Step 3: Cross multiply
   1,725.72x = 2,381.46 × 939.74
4. Step 4: Simplify right side
   1,725.72x = 2,237,953.22
5. Step 5: Solve for x
   x = 2,237,953.22/1,725.72
6. Step 6: Final answer
   x = 1,296.82