Finding the Fourth Proportional to 3,892.86, 5,372.15 and 2,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.86 : 5,372.15 = 2,124.50 : x
2. Step 2: Convert to fraction form
   3,892.86/5,372.15 = 2,124.50/x
3. Step 3: Cross multiply
   3,892.86x = 5,372.15 × 2,124.50
4. Step 4: Simplify right side
   3,892.86x = 11,413,132.68
5. Step 5: Solve for x
   x = 11,413,132.68/3,892.86
6. Step 6: Final answer
   x = 2,931.81