Finding the Fourth Proportional to 2,328.12, 3,487.38 and 1,680.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.12 : 3,487.38 = 1,680.12 : x
2. Step 2: Convert to fraction form
   2,328.12/3,487.38 = 1,680.12/x
3. Step 3: Cross multiply
   2,328.12x = 3,487.38 × 1,680.12
4. Step 4: Simplify right side
   2,328.12x = 5,859,216.89
5. Step 5: Solve for x
   x = 5,859,216.89/2,328.12
6. Step 6: Final answer
   x = 2,516.72