Finding the Fourth Proportional to 1,665.36, 2,499.48 and 936.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.36 : 2,499.48 = 936.48 : x
2. Step 2: Convert to fraction form
   1,665.36/2,499.48 = 936.48/x
3. Step 3: Cross multiply
   1,665.36x = 2,499.48 × 936.48
4. Step 4: Simplify right side
   1,665.36x = 2,340,713.03
5. Step 5: Solve for x
   x = 2,340,713.03/1,665.36
6. Step 6: Final answer
   x = 1,405.53