Finding the Fourth Proportional to 3,892.89, 5,372.18 and 2,124.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.89 : 5,372.18 = 2,124.49 : x
2. Step 2: Convert to fraction form
   3,892.89/5,372.18 = 2,124.49/x
3. Step 3: Cross multiply
   3,892.89x = 5,372.18 × 2,124.49
4. Step 4: Simplify right side
   3,892.89x = 11,413,145.50
5. Step 5: Solve for x
   x = 11,413,145.50/3,892.89
6. Step 6: Final answer
   x = 2,931.79