Finding the Fourth Proportional to 2,210.78, 3,050.91 and 1,216.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.78 : 3,050.91 = 1,216.06 : x
2. Step 2: Convert to fraction form
   2,210.78/3,050.91 = 1,216.06/x
3. Step 3: Cross multiply
   2,210.78x = 3,050.91 × 1,216.06
4. Step 4: Simplify right side
   2,210.78x = 3,710,081.99
5. Step 5: Solve for x
   x = 3,710,081.99/2,210.78
6. Step 6: Final answer
   x = 1,678.18