Finding the Fourth Proportional to 2,190.79, 3,023.46 and 1,246.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.79 : 3,023.46 = 1,246.89 : x
2. Step 2: Convert to fraction form
   2,190.79/3,023.46 = 1,246.89/x
3. Step 3: Cross multiply
   2,190.79x = 3,023.46 × 1,246.89
4. Step 4: Simplify right side
   2,190.79x = 3,769,900.69
5. Step 5: Solve for x
   x = 3,769,900.69/2,190.79
6. Step 6: Final answer
   x = 1,720.80