Finding the Fourth Proportional to 2,048.79, 2,826.50 and 1,428.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,048.79 : 2,826.50 = 1,428.15 : x
2. Step 2: Convert to fraction form
   2,048.79/2,826.50 = 1,428.15/x
3. Step 3: Cross multiply
   2,048.79x = 2,826.50 × 1,428.15
4. Step 4: Simplify right side
   2,048.79x = 4,036,658.83
5. Step 5: Solve for x
   x = 4,036,658.83/2,048.79
6. Step 6: Final answer
   x = 1,970.26