Finding the Fourth Proportional to 1,355.77, 1,870.50 and 796.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.77 : 1,870.50 = 796.20 : x
2. Step 2: Convert to fraction form
   1,355.77/1,870.50 = 796.20/x
3. Step 3: Cross multiply
   1,355.77x = 1,870.50 × 796.20
4. Step 4: Simplify right side
   1,355.77x = 1,489,292.10
5. Step 5: Solve for x
   x = 1,489,292.10/1,355.77
6. Step 6: Final answer
   x = 1,098.48