Finding the Fourth Proportional to 1,182.38, 1,630.22 and 788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.38 : 1,630.22 = 788.72 : x
2. Step 2: Convert to fraction form
   1,182.38/1,630.22 = 788.72/x
3. Step 3: Cross multiply
   1,182.38x = 1,630.22 × 788.72
4. Step 4: Simplify right side
   1,182.38x = 1,285,787.12
5. Step 5: Solve for x
   x = 1,285,787.12/1,182.38
6. Step 6: Final answer
   x = 1,087.46