Finding the Fourth Proportional to 1,147.87, 1,581.78 and 797.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.87 : 1,581.78 = 797.95 : x
2. Step 2: Convert to fraction form
   1,147.87/1,581.78 = 797.95/x
3. Step 3: Cross multiply
   1,147.87x = 1,581.78 × 797.95
4. Step 4: Simplify right side
   1,147.87x = 1,262,181.83
5. Step 5: Solve for x
   x = 1,262,181.83/1,147.87
6. Step 6: Final answer
   x = 1,099.58