Finding the Fourth Proportional to 3,920.88, 5,410.82 and 2,152.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920.88 : 5,410.82 = 2,152.50 : x
2. Step 2: Convert to fraction form
   3,920.88/5,410.82 = 2,152.50/x
3. Step 3: Cross multiply
   3,920.88x = 5,410.82 × 2,152.50
4. Step 4: Simplify right side
   3,920.88x = 11,646,790.05
5. Step 5: Solve for x
   x = 11,646,790.05/3,920.88
6. Step 6: Final answer
   x = 2,970.45