Finding the Fourth Proportional to 1,320.69, 1,822.58 and 723.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.69 : 1,822.58 = 723.18 : x
2. Step 2: Convert to fraction form
   1,320.69/1,822.58 = 723.18/x
3. Step 3: Cross multiply
   1,320.69x = 1,822.58 × 723.18
4. Step 4: Simplify right side
   1,320.69x = 1,318,053.40
5. Step 5: Solve for x
   x = 1,318,053.40/1,320.69
6. Step 6: Final answer
   x = 998.00