Finding the Fourth Proportional to 2,308.21, 3,187.98 and 1,681.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.21 : 3,187.98 = 1,681.54 : x
2. Step 2: Convert to fraction form
   2,308.21/3,187.98 = 1,681.54/x
3. Step 3: Cross multiply
   2,308.21x = 3,187.98 × 1,681.54
4. Step 4: Simplify right side
   2,308.21x = 5,360,715.89
5. Step 5: Solve for x
   x = 5,360,715.89/2,308.21
6. Step 6: Final answer
   x = 2,322.46