Finding the Fourth Proportional to 1,215.56, 1,673.79 and 1,018.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.56 : 1,673.79 = 1,018.73 : x
2. Step 2: Convert to fraction form
   1,215.56/1,673.79 = 1,018.73/x
3. Step 3: Cross multiply
   1,215.56x = 1,673.79 × 1,018.73
4. Step 4: Simplify right side
   1,215.56x = 1,705,139.90
5. Step 5: Solve for x
   x = 1,705,139.90/1,215.56
6. Step 6: Final answer
   x = 1,402.76