Finding the Fourth Proportional to 1,725.83, 2,381.64 and 939.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,725.83 : 2,381.64 = 939.89 : x
2. Step 2: Convert to fraction form
   1,725.83/2,381.64 = 939.89/x
3. Step 3: Cross multiply
   1,725.83x = 2,381.64 × 939.89
4. Step 4: Simplify right side
   1,725.83x = 2,238,482.05
5. Step 5: Solve for x
   x = 2,238,482.05/1,725.83
6. Step 6: Final answer
   x = 1,297.05