Finding the Fourth Proportional to 4,321.72, 5,961.90 and 2,828.98

Step by Step Solution

1. Step 1: Write the proportion equation
   4,321.72 : 5,961.90 = 2,828.98 : x
2. Step 2: Convert to fraction form
   4,321.72/5,961.90 = 2,828.98/x
3. Step 3: Cross multiply
   4,321.72x = 5,961.90 × 2,828.98
4. Step 4: Simplify right side
   4,321.72x = 16,866,095.86
5. Step 5: Solve for x
   x = 16,866,095.86/4,321.72
6. Step 6: Final answer
   x = 3,902.64