Finding the Fourth Proportional to 3,699.96, 5,106.10 and 2,128.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.96 : 5,106.10 = 2,128.06 : x
2. Step 2: Convert to fraction form
   3,699.96/5,106.10 = 2,128.06/x
3. Step 3: Cross multiply
   3,699.96x = 5,106.10 × 2,128.06
4. Step 4: Simplify right side
   3,699.96x = 10,866,061.64
5. Step 5: Solve for x
   x = 10,866,061.64/3,699.96
6. Step 6: Final answer
   x = 2,936.81