Finding the Fourth Proportional to 1,780.24, 2,456.72 and 983.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.24 : 2,456.72 = 983.62 : x
2. Step 2: Convert to fraction form
   1,780.24/2,456.72 = 983.62/x
3. Step 3: Cross multiply
   1,780.24x = 2,456.72 × 983.62
4. Step 4: Simplify right side
   1,780.24x = 2,416,484.00
5. Step 5: Solve for x
   x = 2,416,484.00/1,780.24
6. Step 6: Final answer
   x = 1,357.39