Finding the Fourth Proportional to 3,700.43, 5,106.74 and 2,128.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.43 : 5,106.74 = 2,128.52 : x
2. Step 2: Convert to fraction form
   3,700.43/5,106.74 = 2,128.52/x
3. Step 3: Cross multiply
   3,700.43x = 5,106.74 × 2,128.52
4. Step 4: Simplify right side
   3,700.43x = 10,869,798.22
5. Step 5: Solve for x
   x = 10,869,798.22/3,700.43
6. Step 6: Final answer
   x = 2,937.44