Finding the Fourth Proportional to 2,111.52, 3,170.52 and 2,072.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.52 : 3,170.52 = 2,072.64 : x
2. Step 2: Convert to fraction form
   2,111.52/3,170.52 = 2,072.64/x
3. Step 3: Cross multiply
   2,111.52x = 3,170.52 × 2,072.64
4. Step 4: Simplify right side
   2,111.52x = 6,571,346.57
5. Step 5: Solve for x
   x = 6,571,346.57/2,111.52
6. Step 6: Final answer
   x = 3,112.14