Finding the Fourth Proportional to 2,490.41, 3,436.78 and 1,371.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.41 : 3,436.78 = 1,371.30 : x
2. Step 2: Convert to fraction form
   2,490.41/3,436.78 = 1,371.30/x
3. Step 3: Cross multiply
   2,490.41x = 3,436.78 × 1,371.30
4. Step 4: Simplify right side
   2,490.41x = 4,712,842.67
5. Step 5: Solve for x
   x = 4,712,842.67/2,490.41
6. Step 6: Final answer
   x = 1,892.39