Finding the Fourth Proportional to 3,199.28, 4,792.72 and 2,100.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,199.28 : 4,792.72 = 2,100.28 : x
2. Step 2: Convert to fraction form
   3,199.28/4,792.72 = 2,100.28/x
3. Step 3: Cross multiply
   3,199.28x = 4,792.72 × 2,100.28
4. Step 4: Simplify right side
   3,199.28x = 10,066,053.96
5. Step 5: Solve for x
   x = 10,066,053.96/3,199.28
6. Step 6: Final answer
   x = 3,146.35