Finding the Fourth Proportional to 2,490.31, 3,436.70 and 1,371.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.31 : 3,436.70 = 1,371.34 : x
2. Step 2: Convert to fraction form
   2,490.31/3,436.70 = 1,371.34/x
3. Step 3: Cross multiply
   2,490.31x = 3,436.70 × 1,371.34
4. Step 4: Simplify right side
   2,490.31x = 4,712,884.18
5. Step 5: Solve for x
   x = 4,712,884.18/2,490.31
6. Step 6: Final answer
   x = 1,892.49