Finding the Fourth Proportional to 2,213.72, 3,054.89 and 1,218.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.72 : 3,054.89 = 1,218.96 : x
2. Step 2: Convert to fraction form
   2,213.72/3,054.89 = 1,218.96/x
3. Step 3: Cross multiply
   2,213.72x = 3,054.89 × 1,218.96
4. Step 4: Simplify right side
   2,213.72x = 3,723,782.62
5. Step 5: Solve for x
   x = 3,723,782.62/2,213.72
6. Step 6: Final answer
   x = 1,682.14