Finding the Fourth Proportional to 4,760.84, 7,142.94 and 2,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,760.84 : 7,142.94 = 2,128.10 : x
2. Step 2: Convert to fraction form
   4,760.84/7,142.94 = 2,128.10/x
3. Step 3: Cross multiply
   4,760.84x = 7,142.94 × 2,128.10
4. Step 4: Simplify right side
   4,760.84x = 15,200,854.90
5. Step 5: Solve for x
   x = 15,200,854.90/4,760.84
6. Step 6: Final answer
   x = 3,192.89