Finding the Fourth Proportional to 3,880.42, 5,354.98 and 2,112.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,880.42 : 5,354.98 = 2,112.02 : x
2. Step 2: Convert to fraction form
   3,880.42/5,354.98 = 2,112.02/x
3. Step 3: Cross multiply
   3,880.42x = 5,354.98 × 2,112.02
4. Step 4: Simplify right side
   3,880.42x = 11,309,824.86
5. Step 5: Solve for x
   x = 11,309,824.86/3,880.42
6. Step 6: Final answer
   x = 2,914.59