Finding the Fourth Proportional to 2,148.67, 3,222.51 and 687.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.67 : 3,222.51 = 687.43 : x
2. Step 2: Convert to fraction form
   2,148.67/3,222.51 = 687.43/x
3. Step 3: Cross multiply
   2,148.67x = 3,222.51 × 687.43
4. Step 4: Simplify right side
   2,148.67x = 2,215,250.05
5. Step 5: Solve for x
   x = 2,215,250.05/2,148.67
6. Step 6: Final answer
   x = 1,030.99