Finding the Fourth Proportional to 2,111.40, 2,950.20 and 2,111.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.40 : 2,950.20 = 2,111.40 : x
2. Step 2: Convert to fraction form
   2,111.40/2,950.20 = 2,111.40/x
3. Step 3: Cross multiply
   2,111.40x = 2,950.20 × 2,111.40
4. Step 4: Simplify right side
   2,111.40x = 6,229,052.28
5. Step 5: Solve for x
   x = 6,229,052.28/2,111.40
6. Step 6: Final answer
   x = 2,950.20