Finding the Fourth Proportional to 1,788.54, 2,683.98 and 815.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.54 : 2,683.98 = 815.46 : x
2. Step 2: Convert to fraction form
   1,788.54/2,683.98 = 815.46/x
3. Step 3: Cross multiply
   1,788.54x = 2,683.98 × 815.46
4. Step 4: Simplify right side
   1,788.54x = 2,188,678.33
5. Step 5: Solve for x
   x = 2,188,678.33/1,788.54
6. Step 6: Final answer
   x = 1,223.72