Finding the Fourth Proportional to 3,699.98, 5,105.93 and 2,128.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.98 : 5,105.93 = 2,128.08 : x
2. Step 2: Convert to fraction form
   3,699.98/5,105.93 = 2,128.08/x
3. Step 3: Cross multiply
   3,699.98x = 5,105.93 × 2,128.08
4. Step 4: Simplify right side
   3,699.98x = 10,865,827.51
5. Step 5: Solve for x
   x = 10,865,827.51/3,699.98
6. Step 6: Final answer
   x = 2,936.73