Finding the Fourth Proportional to 3,700.37, 5,107.61 and 2,129.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.37 : 5,107.61 = 2,129.57 : x
2. Step 2: Convert to fraction form
   3,700.37/5,107.61 = 2,129.57/x
3. Step 3: Cross multiply
   3,700.37x = 5,107.61 × 2,129.57
4. Step 4: Simplify right side
   3,700.37x = 10,877,002.38
5. Step 5: Solve for x
   x = 10,877,002.38/3,700.37
6. Step 6: Final answer
   x = 2,939.44