Finding the Fourth Proportional to 1,423.15, 1,963.14 and 898.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.15 : 1,963.14 = 898.27 : x
2. Step 2: Convert to fraction form
   1,423.15/1,963.14 = 898.27/x
3. Step 3: Cross multiply
   1,423.15x = 1,963.14 × 898.27
4. Step 4: Simplify right side
   1,423.15x = 1,763,429.77
5. Step 5: Solve for x
   x = 1,763,429.77/1,423.15
6. Step 6: Final answer
   x = 1,239.10