Finding the Fourth Proportional to 1,427.79, 1,969.76 and 868.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.79 : 1,969.76 = 868.17 : x
2. Step 2: Convert to fraction form
   1,427.79/1,969.76 = 868.17/x
3. Step 3: Cross multiply
   1,427.79x = 1,969.76 × 868.17
4. Step 4: Simplify right side
   1,427.79x = 1,710,096.10
5. Step 5: Solve for x
   x = 1,710,096.10/1,427.79
6. Step 6: Final answer
   x = 1,197.72