Finding the Fourth Proportional to 2,210.83, 3,051.15 and 1,216.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.83 : 3,051.15 = 1,216.31 : x
2. Step 2: Convert to fraction form
   2,210.83/3,051.15 = 1,216.31/x
3. Step 3: Cross multiply
   2,210.83x = 3,051.15 × 1,216.31
4. Step 4: Simplify right side
   2,210.83x = 3,711,144.26
5. Step 5: Solve for x
   x = 3,711,144.26/2,210.83
6. Step 6: Final answer
   x = 1,678.62