Finding the Fourth Proportional to 2,870.79, 4,288.73 and 1,822.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.79 : 4,288.73 = 1,822.38 : x
2. Step 2: Convert to fraction form
   2,870.79/4,288.73 = 1,822.38/x
3. Step 3: Cross multiply
   2,870.79x = 4,288.73 × 1,822.38
4. Step 4: Simplify right side
   2,870.79x = 7,815,695.78
5. Step 5: Solve for x
   x = 7,815,695.78/2,870.79
6. Step 6: Final answer
   x = 2,722.49