Finding the Fourth Proportional to 2,398.90, 3,310.72 and 1,404.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,398.90 : 3,310.72 = 1,404.12 : x
2. Step 2: Convert to fraction form
   2,398.90/3,310.72 = 1,404.12/x
3. Step 3: Cross multiply
   2,398.90x = 3,310.72 × 1,404.12
4. Step 4: Simplify right side
   2,398.90x = 4,648,624.59
5. Step 5: Solve for x
   x = 4,648,624.59/2,398.90
6. Step 6: Final answer
   x = 1,937.82