Finding the Fourth Proportional to 1,238.15, 1,709.42 and 796.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.15 : 1,709.42 = 796.82 : x
2. Step 2: Convert to fraction form
   1,238.15/1,709.42 = 796.82/x
3. Step 3: Cross multiply
   1,238.15x = 1,709.42 × 796.82
4. Step 4: Simplify right side
   1,238.15x = 1,362,096.20
5. Step 5: Solve for x
   x = 1,362,096.20/1,238.15
6. Step 6: Final answer
   x = 1,100.11