Finding the Fourth Proportional to 2,985.29, 4,122.18 and 2,490.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,985.29 : 4,122.18 = 2,490.52 : x
2. Step 2: Convert to fraction form
   2,985.29/4,122.18 = 2,490.52/x
3. Step 3: Cross multiply
   2,985.29x = 4,122.18 × 2,490.52
4. Step 4: Simplify right side
   2,985.29x = 10,266,361.43
5. Step 5: Solve for x
   x = 10,266,361.43/2,985.29
6. Step 6: Final answer
   x = 3,438.99