Finding the Fourth Proportional to 2,190.50, 3,022.90 and 1,404.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.50 : 3,022.90 = 1,404.55 : x
2. Step 2: Convert to fraction form
   2,190.50/3,022.90 = 1,404.55/x
3. Step 3: Cross multiply
   2,190.50x = 3,022.90 × 1,404.55
4. Step 4: Simplify right side
   2,190.50x = 4,245,803.13
5. Step 5: Solve for x
   x = 4,245,803.13/2,190.50
6. Step 6: Final answer
   x = 1,938.28