Finding the Fourth Proportional to 1,181.98, 1,630.56 and 789.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.98 : 1,630.56 = 789.13 : x
2. Step 2: Convert to fraction form
   1,181.98/1,630.56 = 789.13/x
3. Step 3: Cross multiply
   1,181.98x = 1,630.56 × 789.13
4. Step 4: Simplify right side
   1,181.98x = 1,286,723.81
5. Step 5: Solve for x
   x = 1,286,723.81/1,181.98
6. Step 6: Final answer
   x = 1,088.62