Finding the Fourth Proportional to 3,892.56, 5,372.32 and 2,213.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.56 : 5,372.32 = 2,213.96 : x
2. Step 2: Convert to fraction form
   3,892.56/5,372.32 = 2,213.96/x
3. Step 3: Cross multiply
   3,892.56x = 5,372.32 × 2,213.96
4. Step 4: Simplify right side
   3,892.56x = 11,894,101.59
5. Step 5: Solve for x
   x = 11,894,101.59/3,892.56
6. Step 6: Final answer
   x = 3,055.60