Finding the Fourth Proportional to 1,419.80, 1,959.32 and 798.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.80 : 1,959.32 = 798.80 : x
2. Step 2: Convert to fraction form
   1,419.80/1,959.32 = 798.80/x
3. Step 3: Cross multiply
   1,419.80x = 1,959.32 × 798.80
4. Step 4: Simplify right side
   1,419.80x = 1,565,111.71
5. Step 5: Solve for x
   x = 1,565,111.71/1,419.80
6. Step 6: Final answer
   x = 1,102.34