Finding the Fourth Proportional to 1,662.09, 2,493.60 and 725.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.09 : 2,493.60 = 725.12 : x
2. Step 2: Convert to fraction form
   1,662.09/2,493.60 = 725.12/x
3. Step 3: Cross multiply
   1,662.09x = 2,493.60 × 725.12
4. Step 4: Simplify right side
   1,662.09x = 1,808,147.16
5. Step 5: Solve for x
   x = 1,808,147.16/1,662.09
6. Step 6: Final answer
   x = 1,087.88