Finding the Fourth Proportional to 1,930.24, 2,658.72 and 1,681.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,930.24 : 2,658.72 = 1,681.12 : x
2. Step 2: Convert to fraction form
   1,930.24/2,658.72 = 1,681.12/x
3. Step 3: Cross multiply
   1,930.24x = 2,658.72 × 1,681.12
4. Step 4: Simplify right side
   1,930.24x = 4,469,627.37
5. Step 5: Solve for x
   x = 4,469,627.37/1,930.24
6. Step 6: Final answer
   x = 2,315.58