Finding the Fourth Proportional to 2,210.40, 3,050.24 and 1,215.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.40 : 3,050.24 = 1,215.72 : x
2. Step 2: Convert to fraction form
   2,210.40/3,050.24 = 1,215.72/x
3. Step 3: Cross multiply
   2,210.40x = 3,050.24 × 1,215.72
4. Step 4: Simplify right side
   2,210.40x = 3,708,231.69
5. Step 5: Solve for x
   x = 3,708,231.69/2,210.40
6. Step 6: Final answer
   x = 1,677.63