Finding the Fourth Proportional to 2,218.76, 3,061.77 and 1,223.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.76 : 3,061.77 = 1,223.84 : x
2. Step 2: Convert to fraction form
   2,218.76/3,061.77 = 1,223.84/x
3. Step 3: Cross multiply
   2,218.76x = 3,061.77 × 1,223.84
4. Step 4: Simplify right side
   2,218.76x = 3,747,116.60
5. Step 5: Solve for x
   x = 3,747,116.60/2,218.76
6. Step 6: Final answer
   x = 1,688.83