Finding the Fourth Proportional to 3,921.05, 5,411.03 and 2,152.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.05 : 5,411.03 = 2,152.69 : x
2. Step 2: Convert to fraction form
   3,921.05/5,411.03 = 2,152.69/x
3. Step 3: Cross multiply
   3,921.05x = 5,411.03 × 2,152.69
4. Step 4: Simplify right side
   3,921.05x = 11,648,270.17
5. Step 5: Solve for x
   x = 11,648,270.17/3,921.05
6. Step 6: Final answer
   x = 2,970.70