Finding the Fourth Proportional to 2,214.72, 3,056.35 and 1,219.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,214.72 : 3,056.35 = 1,219.99 : x
2. Step 2: Convert to fraction form
   2,214.72/3,056.35 = 1,219.99/x
3. Step 3: Cross multiply
   2,214.72x = 3,056.35 × 1,219.99
4. Step 4: Simplify right side
   2,214.72x = 3,728,705.75
5. Step 5: Solve for x
   x = 3,728,705.75/2,214.72
6. Step 6: Final answer
   x = 1,683.60