Finding the Fourth Proportional to 2,148.30, 3,222.86 and 687.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.30 : 3,222.86 = 687.53 : x
2. Step 2: Convert to fraction form
   2,148.30/3,222.86 = 687.53/x
3. Step 3: Cross multiply
   2,148.30x = 3,222.86 × 687.53
4. Step 4: Simplify right side
   2,148.30x = 2,215,817.56
5. Step 5: Solve for x
   x = 2,215,817.56/2,148.30
6. Step 6: Final answer
   x = 1,031.43