Finding the Fourth Proportional to 2,219.55, 3,062.88 and 1,224.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.55 : 3,062.88 = 1,224.78 : x
2. Step 2: Convert to fraction form
   2,219.55/3,062.88 = 1,224.78/x
3. Step 3: Cross multiply
   2,219.55x = 3,062.88 × 1,224.78
4. Step 4: Simplify right side
   2,219.55x = 3,751,354.17
5. Step 5: Solve for x
   x = 3,751,354.17/2,219.55
6. Step 6: Final answer
   x = 1,690.14