Finding the Fourth Proportional to 2,401.90, 3,315.44 and 1,407.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,401.90 : 3,315.44 = 1,407.49 : x
2. Step 2: Convert to fraction form
   2,401.90/3,315.44 = 1,407.49/x
3. Step 3: Cross multiply
   2,401.90x = 3,315.44 × 1,407.49
4. Step 4: Simplify right side
   2,401.90x = 4,666,441.61
5. Step 5: Solve for x
   x = 4,666,441.61/2,401.90
6. Step 6: Final answer
   x = 1,942.82