Finding the Fourth Proportional to 1,665.36, 2,496.69 and 787.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.36 : 2,496.69 = 787.39 : x
2. Step 2: Convert to fraction form
   1,665.36/2,496.69 = 787.39/x
3. Step 3: Cross multiply
   1,665.36x = 2,496.69 × 787.39
4. Step 4: Simplify right side
   1,665.36x = 1,965,862.50
5. Step 5: Solve for x
   x = 1,965,862.50/1,665.36
6. Step 6: Final answer
   x = 1,180.44