Finding the Fourth Proportional to 1,356.60, 1,871.86 and 797.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.60 : 1,871.86 = 797.09 : x
2. Step 2: Convert to fraction form
   1,356.60/1,871.86 = 797.09/x
3. Step 3: Cross multiply
   1,356.60x = 1,871.86 × 797.09
4. Step 4: Simplify right side
   1,356.60x = 1,492,041.56
5. Step 5: Solve for x
   x = 1,492,041.56/1,356.60
6. Step 6: Final answer
   x = 1,099.84