Finding the Fourth Proportional to 2,219.79, 3,063.27 and 1,225.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.79 : 3,063.27 = 1,225.05 : x
2. Step 2: Convert to fraction form
   2,219.79/3,063.27 = 1,225.05/x
3. Step 3: Cross multiply
   2,219.79x = 3,063.27 × 1,225.05
4. Step 4: Simplify right side
   2,219.79x = 3,752,658.91
5. Step 5: Solve for x
   x = 3,752,658.91/2,219.79
6. Step 6: Final answer
   x = 1,690.55