Finding the Fourth Proportional to 2,219.97, 3,063.55 and 1,225.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.97 : 3,063.55 = 1,225.31 : x
2. Step 2: Convert to fraction form
   2,219.97/3,063.55 = 1,225.31/x
3. Step 3: Cross multiply
   2,219.97x = 3,063.55 × 1,225.31
4. Step 4: Simplify right side
   2,219.97x = 3,753,798.45
5. Step 5: Solve for x
   x = 3,753,798.45/2,219.97
6. Step 6: Final answer
   x = 1,690.92