Finding the Fourth Proportional to 3,699.80, 5,105.72 and 2,127.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.80 : 5,105.72 = 2,127.89 : x
2. Step 2: Convert to fraction form
   3,699.80/5,105.72 = 2,127.89/x
3. Step 3: Cross multiply
   3,699.80x = 5,105.72 × 2,127.89
4. Step 4: Simplify right side
   3,699.80x = 10,864,410.53
5. Step 5: Solve for x
   x = 10,864,410.53/3,699.80
6. Step 6: Final answer
   x = 2,936.49