Finding the Fourth Proportional to 1,427.42, 1,970.22 and 867.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.42 : 1,970.22 = 867.71 : x
2. Step 2: Convert to fraction form
   1,427.42/1,970.22 = 867.71/x
3. Step 3: Cross multiply
   1,427.42x = 1,970.22 × 867.71
4. Step 4: Simplify right side
   1,427.42x = 1,709,587.78
5. Step 5: Solve for x
   x = 1,709,587.78/1,427.42
6. Step 6: Final answer
   x = 1,197.67