Finding the Fourth Proportional to 2,199.96, 3,298.32 and 1,224.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,199.96 : 3,298.32 = 1,224.72 : x
2. Step 2: Convert to fraction form
   2,199.96/3,298.32 = 1,224.72/x
3. Step 3: Cross multiply
   2,199.96x = 3,298.32 × 1,224.72
4. Step 4: Simplify right side
   2,199.96x = 4,039,518.47
5. Step 5: Solve for x
   x = 4,039,518.47/2,199.96
6. Step 6: Final answer
   x = 1,836.18