Finding the Fourth Proportional to 1,355.80, 1,870.72 and 796.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.80 : 1,870.72 = 796.32 : x
2. Step 2: Convert to fraction form
   1,355.80/1,870.72 = 796.32/x
3. Step 3: Cross multiply
   1,355.80x = 1,870.72 × 796.32
4. Step 4: Simplify right side
   1,355.80x = 1,489,691.75
5. Step 5: Solve for x
   x = 1,489,691.75/1,355.80
6. Step 6: Final answer
   x = 1,098.75