Finding the Fourth Proportional to 5,218.72, 7,201.82 and 2,860.86

Step by Step Solution

1. Step 1: Write the proportion equation
   5,218.72 : 7,201.82 = 2,860.86 : x
2. Step 2: Convert to fraction form
   5,218.72/7,201.82 = 2,860.86/x
3. Step 3: Cross multiply
   5,218.72x = 7,201.82 × 2,860.86
4. Step 4: Simplify right side
   5,218.72x = 20,603,384.46
5. Step 5: Solve for x
   x = 20,603,384.46/5,218.72
6. Step 6: Final answer
   x = 3,947.98