Finding the Fourth Proportional to 2,019.51, 2,783.50 and 1,540.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.51 : 2,783.50 = 1,540.80 : x
2. Step 2: Convert to fraction form
   2,019.51/2,783.50 = 1,540.80/x
3. Step 3: Cross multiply
   2,019.51x = 2,783.50 × 1,540.80
4. Step 4: Simplify right side
   2,019.51x = 4,288,812.95
5. Step 5: Solve for x
   x = 4,288,812.95/2,019.51
6. Step 6: Final answer
   x = 2,123.69