Finding the Fourth Proportional to 1,423.49, 2,134.83 and 902.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.49 : 2,134.83 = 902.71 : x
2. Step 2: Convert to fraction form
   1,423.49/2,134.83 = 902.71/x
3. Step 3: Cross multiply
   1,423.49x = 2,134.83 × 902.71
4. Step 4: Simplify right side
   1,423.49x = 1,927,121.72
5. Step 5: Solve for x
   x = 1,927,121.72/1,423.49
6. Step 6: Final answer
   x = 1,353.80