Finding the Fourth Proportional to 1,357.40, 1,872.98 and 797.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.40 : 1,872.98 = 797.76 : x
2. Step 2: Convert to fraction form
   1,357.40/1,872.98 = 797.76/x
3. Step 3: Cross multiply
   1,357.40x = 1,872.98 × 797.76
4. Step 4: Simplify right side
   1,357.40x = 1,494,188.52
5. Step 5: Solve for x
   x = 1,494,188.52/1,357.40
6. Step 6: Final answer
   x = 1,100.77