Finding the Fourth Proportional to 1,162.45, 1,604.46 and 720.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.45 : 1,604.46 = 720.09 : x
2. Step 2: Convert to fraction form
   1,162.45/1,604.46 = 720.09/x
3. Step 3: Cross multiply
   1,162.45x = 1,604.46 × 720.09
4. Step 4: Simplify right side
   1,162.45x = 1,155,354.25
5. Step 5: Solve for x
   x = 1,155,354.25/1,162.45
6. Step 6: Final answer
   x = 993.89