Finding the Fourth Proportional to 7,057.10, 9,738.90 and 3,870.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,057.10 : 9,738.90 = 3,870.69 : x
2. Step 2: Convert to fraction form
   7,057.10/9,738.90 = 3,870.69/x
3. Step 3: Cross multiply
   7,057.10x = 9,738.90 × 3,870.69
4. Step 4: Simplify right side
   7,057.10x = 37,696,262.84
5. Step 5: Solve for x
   x = 37,696,262.84/7,057.10
6. Step 6: Final answer
   x = 5,341.61