Finding the Fourth Proportional to 1,780.88, 2,457.59 and 984.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.88 : 2,457.59 = 984.25 : x
2. Step 2: Convert to fraction form
   1,780.88/2,457.59 = 984.25/x
3. Step 3: Cross multiply
   1,780.88x = 2,457.59 × 984.25
4. Step 4: Simplify right side
   1,780.88x = 2,418,882.96
5. Step 5: Solve for x
   x = 2,418,882.96/1,780.88
6. Step 6: Final answer
   x = 1,358.26