Finding the Fourth Proportional to 3,700.82, 5,107.29 and 2,128.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.82 : 5,107.29 = 2,128.92 : x
2. Step 2: Convert to fraction form
   3,700.82/5,107.29 = 2,128.92/x
3. Step 3: Cross multiply
   3,700.82x = 5,107.29 × 2,128.92
4. Step 4: Simplify right side
   3,700.82x = 10,873,011.83
5. Step 5: Solve for x
   x = 10,873,011.83/3,700.82
6. Step 6: Final answer
   x = 2,938.00