Finding the Fourth Proportional to 1,725.84, 2,381.72 and 979.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,725.84 : 2,381.72 = 979.92 : x
2. Step 2: Convert to fraction form
   1,725.84/2,381.72 = 979.92/x
3. Step 3: Cross multiply
   1,725.84x = 2,381.72 × 979.92
4. Step 4: Simplify right side
   1,725.84x = 2,333,890.16
5. Step 5: Solve for x
   x = 2,333,890.16/1,725.84
6. Step 6: Final answer
   x = 1,352.32