Finding the Fourth Proportional to 3,892.40, 5,371.59 and 2,124.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.40 : 5,371.59 = 2,124.08 : x
2. Step 2: Convert to fraction form
   3,892.40/5,371.59 = 2,124.08/x
3. Step 3: Cross multiply
   3,892.40x = 5,371.59 × 2,124.08
4. Step 4: Simplify right side
   3,892.40x = 11,409,686.89
5. Step 5: Solve for x
   x = 11,409,686.89/3,892.40
6. Step 6: Final answer
   x = 2,931.27