Finding the Fourth Proportional to 1,320.89, 1,981.63 and 704.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.89 : 1,981.63 = 704.27 : x
2. Step 2: Convert to fraction form
   1,320.89/1,981.63 = 704.27/x
3. Step 3: Cross multiply
   1,320.89x = 1,981.63 × 704.27
4. Step 4: Simplify right side
   1,320.89x = 1,395,592.65
5. Step 5: Solve for x
   x = 1,395,592.65/1,320.89
6. Step 6: Final answer
   x = 1,056.56