Finding the Fourth Proportional to 2,219.86, 3,062.73 and 1,288.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.86 : 3,062.73 = 1,288.18 : x
2. Step 2: Convert to fraction form
   2,219.86/3,062.73 = 1,288.18/x
3. Step 3: Cross multiply
   2,219.86x = 3,062.73 × 1,288.18
4. Step 4: Simplify right side
   2,219.86x = 3,945,347.53
5. Step 5: Solve for x
   x = 3,945,347.53/2,219.86
6. Step 6: Final answer
   x = 1,777.30