Finding the Fourth Proportional to 2,210.80, 3,050.98 and 1,216.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.80 : 3,050.98 = 1,216.15 : x
2. Step 2: Convert to fraction form
   2,210.80/3,050.98 = 1,216.15/x
3. Step 3: Cross multiply
   2,210.80x = 3,050.98 × 1,216.15
4. Step 4: Simplify right side
   2,210.80x = 3,710,427.99
5. Step 5: Solve for x
   x = 3,710,427.99/2,210.80
6. Step 6: Final answer
   x = 1,678.32