Finding the Fourth Proportional to 5,243.58, 7,870.23 and 2,648.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,243.58 : 7,870.23 = 2,648.34 : x
2. Step 2: Convert to fraction form
   5,243.58/7,870.23 = 2,648.34/x
3. Step 3: Cross multiply
   5,243.58x = 7,870.23 × 2,648.34
4. Step 4: Simplify right side
   5,243.58x = 20,843,044.92
5. Step 5: Solve for x
   x = 20,843,044.92/5,243.58
6. Step 6: Final answer
   x = 3,974.96