Finding the Fourth Proportional to 2,490.42, 3,436.16 and 1,427.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.42 : 3,436.16 = 1,427.88 : x
2. Step 2: Convert to fraction form
   2,490.42/3,436.16 = 1,427.88/x
3. Step 3: Cross multiply
   2,490.42x = 3,436.16 × 1,427.88
4. Step 4: Simplify right side
   2,490.42x = 4,906,424.14
5. Step 5: Solve for x
   x = 4,906,424.14/2,490.42
6. Step 6: Final answer
   x = 1,970.12