Finding the Fourth Proportional to 2,219.98, 3,063.59 and 1,225.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.98 : 3,063.59 = 1,225.30 : x
2. Step 2: Convert to fraction form
   2,219.98/3,063.59 = 1,225.30/x
3. Step 3: Cross multiply
   2,219.98x = 3,063.59 × 1,225.30
4. Step 4: Simplify right side
   2,219.98x = 3,753,816.83
5. Step 5: Solve for x
   x = 3,753,816.83/2,219.98
6. Step 6: Final answer
   x = 1,690.92