Finding the Fourth Proportional to 2,830.16, 3,902.28 and 2,622.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,830.16 : 3,902.28 = 2,622.80 : x
2. Step 2: Convert to fraction form
   2,830.16/3,902.28 = 2,622.80/x
3. Step 3: Cross multiply
   2,830.16x = 3,902.28 × 2,622.80
4. Step 4: Simplify right side
   2,830.16x = 10,234,899.98
5. Step 5: Solve for x
   x = 10,234,899.98/2,830.16
6. Step 6: Final answer
   x = 3,616.37