Finding the Fourth Proportional to 3,713.82, 5,124.78 and 2,120.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,713.82 : 5,124.78 = 2,120.28 : x
2. Step 2: Convert to fraction form
   3,713.82/5,124.78 = 2,120.28/x
3. Step 3: Cross multiply
   3,713.82x = 5,124.78 × 2,120.28
4. Step 4: Simplify right side
   3,713.82x = 10,865,968.54
5. Step 5: Solve for x
   x = 10,865,968.54/3,713.82
6. Step 6: Final answer
   x = 2,925.82