Finding the Fourth Proportional to 2,219.72, 3,063.29 and 1,225.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.72 : 3,063.29 = 1,225.13 : x
2. Step 2: Convert to fraction form
   2,219.72/3,063.29 = 1,225.13/x
3. Step 3: Cross multiply
   2,219.72x = 3,063.29 × 1,225.13
4. Step 4: Simplify right side
   2,219.72x = 3,752,907.04
5. Step 5: Solve for x
   x = 3,752,907.04/2,219.72
6. Step 6: Final answer
   x = 1,690.72