Finding the Fourth Proportional to 1,427.78, 1,970.39 and 798.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.78 : 1,970.39 = 798.32 : x
2. Step 2: Convert to fraction form
   1,427.78/1,970.39 = 798.32/x
3. Step 3: Cross multiply
   1,427.78x = 1,970.39 × 798.32
4. Step 4: Simplify right side
   1,427.78x = 1,572,987.90
5. Step 5: Solve for x
   x = 1,572,987.90/1,427.78
6. Step 6: Final answer
   x = 1,101.71