Finding the Fourth Proportional to 1,429.70, 2,142.93 and 908.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.70 : 2,142.93 = 908.42 : x
2. Step 2: Convert to fraction form
   1,429.70/2,142.93 = 908.42/x
3. Step 3: Cross multiply
   1,429.70x = 2,142.93 × 908.42
4. Step 4: Simplify right side
   1,429.70x = 1,946,680.47
5. Step 5: Solve for x
   x = 1,946,680.47/1,429.70
6. Step 6: Final answer
   x = 1,361.60