Finding the Fourth Proportional to 3,700.27, 5,106.91 and 2,128.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.27 : 5,106.91 = 2,128.06 : x
2. Step 2: Convert to fraction form
   3,700.27/5,106.91 = 2,128.06/x
3. Step 3: Cross multiply
   3,700.27x = 5,106.91 × 2,128.06
4. Step 4: Simplify right side
   3,700.27x = 10,867,810.89
5. Step 5: Solve for x
   x = 10,867,810.89/3,700.27
6. Step 6: Final answer
   x = 2,937.03