Finding the Fourth Proportional to 2,213.14, 3,054.07 and 1,218.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.14 : 3,054.07 = 1,218.50 : x
2. Step 2: Convert to fraction form
   2,213.14/3,054.07 = 1,218.50/x
3. Step 3: Cross multiply
   2,213.14x = 3,054.07 × 1,218.50
4. Step 4: Simplify right side
   2,213.14x = 3,721,384.30
5. Step 5: Solve for x
   x = 3,721,384.30/2,213.14
6. Step 6: Final answer
   x = 1,681.50