Finding the Fourth Proportional to 3,700.08, 5,105.97 and 2,128.68

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.08 : 5,105.97 = 2,128.68 : x
2. Step 2: Convert to fraction form
   3,700.08/5,105.97 = 2,128.68/x
3. Step 3: Cross multiply
   3,700.08x = 5,105.97 × 2,128.68
4. Step 4: Simplify right side
   3,700.08x = 10,868,976.22
5. Step 5: Solve for x
   x = 10,868,976.22/3,700.08
6. Step 6: Final answer
   x = 2,937.50