Finding the Fourth Proportional to 3,700.26, 5,106.24 and 2,128.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.26 : 5,106.24 = 2,128.59 : x
2. Step 2: Convert to fraction form
   3,700.26/5,106.24 = 2,128.59/x
3. Step 3: Cross multiply
   3,700.26x = 5,106.24 × 2,128.59
4. Step 4: Simplify right side
   3,700.26x = 10,869,091.40
5. Step 5: Solve for x
   x = 10,869,091.40/3,700.26
6. Step 6: Final answer
   x = 2,937.39