Finding the Fourth Proportional to 2,218.97, 3,061.57 and 1,379.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.97 : 3,061.57 = 1,379.71 : x
2. Step 2: Convert to fraction form
   2,218.97/3,061.57 = 1,379.71/x
3. Step 3: Cross multiply
   2,218.97x = 3,061.57 × 1,379.71
4. Step 4: Simplify right side
   2,218.97x = 4,224,076.98
5. Step 5: Solve for x
   x = 4,224,076.98/2,218.97
6. Step 6: Final answer
   x = 1,903.62