Finding the Fourth Proportional to 1,427.69, 1,969.72 and 867.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.69 : 1,969.72 = 867.98 : x
2. Step 2: Convert to fraction form
   1,427.69/1,969.72 = 867.98/x
3. Step 3: Cross multiply
   1,427.69x = 1,969.72 × 867.98
4. Step 4: Simplify right side
   1,427.69x = 1,709,680.32
5. Step 5: Solve for x
   x = 1,709,680.32/1,427.69
6. Step 6: Final answer
   x = 1,197.51