Finding the Fourth Proportional to 2,210.10, 3,315.69 and 1,236.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.10 : 3,315.69 = 1,236.89 : x
2. Step 2: Convert to fraction form
   2,210.10/3,315.69 = 1,236.89/x
3. Step 3: Cross multiply
   2,210.10x = 3,315.69 × 1,236.89
4. Step 4: Simplify right side
   2,210.10x = 4,101,127.23
5. Step 5: Solve for x
   x = 4,101,127.23/2,210.10
6. Step 6: Final answer
   x = 1,855.63