Finding the Fourth Proportional to 2,219.93, 3,063.50 and 1,225.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.93 : 3,063.50 = 1,225.21 : x
2. Step 2: Convert to fraction form
   2,219.93/3,063.50 = 1,225.21/x
3. Step 3: Cross multiply
   2,219.93x = 3,063.50 × 1,225.21
4. Step 4: Simplify right side
   2,219.93x = 3,753,409.39
5. Step 5: Solve for x
   x = 3,753,409.39/2,219.93
6. Step 6: Final answer
   x = 1,690.78