Finding the Fourth Proportional to 1,320.54, 1,981.98 and 704.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.54 : 1,981.98 = 704.76 : x
2. Step 2: Convert to fraction form
   1,320.54/1,981.98 = 704.76/x
3. Step 3: Cross multiply
   1,320.54x = 1,981.98 × 704.76
4. Step 4: Simplify right side
   1,320.54x = 1,396,820.22
5. Step 5: Solve for x
   x = 1,396,820.22/1,320.54
6. Step 6: Final answer
   x = 1,057.76