Finding the Fourth Proportional to 2,215.10, 3,348.90 and 2,215.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.10 : 3,348.90 = 2,215.10 : x
2. Step 2: Convert to fraction form
   2,215.10/3,348.90 = 2,215.10/x
3. Step 3: Cross multiply
   2,215.10x = 3,348.90 × 2,215.10
4. Step 4: Simplify right side
   2,215.10x = 7,418,148.39
5. Step 5: Solve for x
   x = 7,418,148.39/2,215.10
6. Step 6: Final answer
   x = 3,348.90