Finding the Fourth Proportional to 1,355.40, 1,870.47 and 796.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.40 : 1,870.47 = 796.29 : x
2. Step 2: Convert to fraction form
   1,355.40/1,870.47 = 796.29/x
3. Step 3: Cross multiply
   1,355.40x = 1,870.47 × 796.29
4. Step 4: Simplify right side
   1,355.40x = 1,489,436.56
5. Step 5: Solve for x
   x = 1,489,436.56/1,355.40
6. Step 6: Final answer
   x = 1,098.89