Finding the Fourth Proportional to 3,921.34, 5,411.37 and 2,152.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.34 : 5,411.37 = 2,152.98 : x
2. Step 2: Convert to fraction form
   3,921.34/5,411.37 = 2,152.98/x
3. Step 3: Cross multiply
   3,921.34x = 5,411.37 × 2,152.98
4. Step 4: Simplify right side
   3,921.34x = 11,650,571.38
5. Step 5: Solve for x
   x = 11,650,571.38/3,921.34
6. Step 6: Final answer
   x = 2,971.07