Finding the Fourth Proportional to 2,162.53, 3,237.68 and 1,681.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.53 : 3,237.68 = 1,681.21 : x
2. Step 2: Convert to fraction form
   2,162.53/3,237.68 = 1,681.21/x
3. Step 3: Cross multiply
   2,162.53x = 3,237.68 × 1,681.21
4. Step 4: Simplify right side
   2,162.53x = 5,443,211.59
5. Step 5: Solve for x
   x = 5,443,211.59/2,162.53
6. Step 6: Final answer
   x = 2,517.06