Finding the Fourth Proportional to 1,427.65, 1,969.96 and 798.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.65 : 1,969.96 = 798.15 : x
2. Step 2: Convert to fraction form
   1,427.65/1,969.96 = 798.15/x
3. Step 3: Cross multiply
   1,427.65x = 1,969.96 × 798.15
4. Step 4: Simplify right side
   1,427.65x = 1,572,323.57
5. Step 5: Solve for x
   x = 1,572,323.57/1,427.65
6. Step 6: Final answer
   x = 1,101.34