Finding the Fourth Proportional to 1,200.87, 1,656.68 and 797.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.87 : 1,656.68 = 797.18 : x
2. Step 2: Convert to fraction form
   1,200.87/1,656.68 = 797.18/x
3. Step 3: Cross multiply
   1,200.87x = 1,656.68 × 797.18
4. Step 4: Simplify right side
   1,200.87x = 1,320,659.89
5. Step 5: Solve for x
   x = 1,320,659.89/1,200.87
6. Step 6: Final answer
   x = 1,099.75