Finding the Fourth Proportional to 1,758.72, 2,637.42 and 979.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,758.72 : 2,637.42 = 979.92 : x
2. Step 2: Convert to fraction form
   1,758.72/2,637.42 = 979.92/x
3. Step 3: Cross multiply
   1,758.72x = 2,637.42 × 979.92
4. Step 4: Simplify right side
   1,758.72x = 2,584,460.61
5. Step 5: Solve for x
   x = 2,584,460.61/1,758.72
6. Step 6: Final answer
   x = 1,469.51