Finding the Fourth Proportional to 2,379.72, 3,284.02 and 1,331.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.72 : 3,284.02 = 1,331.78 : x
2. Step 2: Convert to fraction form
   2,379.72/3,284.02 = 1,331.78/x
3. Step 3: Cross multiply
   2,379.72x = 3,284.02 × 1,331.78
4. Step 4: Simplify right side
   2,379.72x = 4,373,592.16
5. Step 5: Solve for x
   x = 4,373,592.16/2,379.72
6. Step 6: Final answer
   x = 1,837.86