Finding the Fourth Proportional to 2,218.87, 3,061.95 and 1,210.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.87 : 3,061.95 = 1,210.54 : x
2. Step 2: Convert to fraction form
   2,218.87/3,061.95 = 1,210.54/x
3. Step 3: Cross multiply
   2,218.87x = 3,061.95 × 1,210.54
4. Step 4: Simplify right side
   2,218.87x = 3,706,612.95
5. Step 5: Solve for x
   x = 3,706,612.95/2,218.87
6. Step 6: Final answer
   x = 1,670.50