Finding the Fourth Proportional to 1,320.90, 1,822.82 and 731.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.90 : 1,822.82 = 731.47 : x
2. Step 2: Convert to fraction form
   1,320.90/1,822.82 = 731.47/x
3. Step 3: Cross multiply
   1,320.90x = 1,822.82 × 731.47
4. Step 4: Simplify right side
   1,320.90x = 1,333,338.15
5. Step 5: Solve for x
   x = 1,333,338.15/1,320.90
6. Step 6: Final answer
   x = 1,009.42