Finding the Fourth Proportional to 2,147.57, 2,972.06 and 2,111.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.57 : 2,972.06 = 2,111.12 : x
2. Step 2: Convert to fraction form
   2,147.57/2,972.06 = 2,111.12/x
3. Step 3: Cross multiply
   2,147.57x = 2,972.06 × 2,111.12
4. Step 4: Simplify right side
   2,147.57x = 6,274,375.31
5. Step 5: Solve for x
   x = 6,274,375.31/2,147.57
6. Step 6: Final answer
   x = 2,921.62