Finding the Fourth Proportional to 3,920.67, 5,410.89 and 2,152.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920.67 : 5,410.89 = 2,152.62 : x
2. Step 2: Convert to fraction form
   3,920.67/5,410.89 = 2,152.62/x
3. Step 3: Cross multiply
   3,920.67x = 5,410.89 × 2,152.62
4. Step 4: Simplify right side
   3,920.67x = 11,647,590.03
5. Step 5: Solve for x
   x = 11,647,590.03/3,920.67
6. Step 6: Final answer
   x = 2,970.82