Finding the Fourth Proportional to 3,700.89, 5,107.05 and 2,129.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.89 : 5,107.05 = 2,129.49 : x
2. Step 2: Convert to fraction form
   3,700.89/5,107.05 = 2,129.49/x
3. Step 3: Cross multiply
   3,700.89x = 5,107.05 × 2,129.49
4. Step 4: Simplify right side
   3,700.89x = 10,875,411.90
5. Step 5: Solve for x
   x = 10,875,411.90/3,700.89
6. Step 6: Final answer
   x = 2,938.59