Finding the Fourth Proportional to 3,920.89, 5,410.89 and 2,152.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920.89 : 5,410.89 = 2,152.48 : x
2. Step 2: Convert to fraction form
   3,920.89/5,410.89 = 2,152.48/x
3. Step 3: Cross multiply
   3,920.89x = 5,410.89 × 2,152.48
4. Step 4: Simplify right side
   3,920.89x = 11,646,832.51
5. Step 5: Solve for x
   x = 11,646,832.51/3,920.89
6. Step 6: Final answer
   x = 2,970.46