Finding the Fourth Proportional to 1,427.15, 1,969.40 and 797.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.15 : 1,969.40 = 797.67 : x
2. Step 2: Convert to fraction form
   1,427.15/1,969.40 = 797.67/x
3. Step 3: Cross multiply
   1,427.15x = 1,969.40 × 797.67
4. Step 4: Simplify right side
   1,427.15x = 1,570,927.31
5. Step 5: Solve for x
   x = 1,570,927.31/1,427.15
6. Step 6: Final answer
   x = 1,100.75