Finding the Fourth Proportional to 10,757.81, 16,140.86 and 5,210.73

Step by Step Solution

1. Step 1: Write the proportion equation
   10,757.81 : 16,140.86 = 5,210.73 : x
2. Step 2: Convert to fraction form
   10,757.81/16,140.86 = 5,210.73/x
3. Step 3: Cross multiply
   10,757.81x = 16,140.86 × 5,210.73
4. Step 4: Simplify right side
   10,757.81x = 84,105,637.37
5. Step 5: Solve for x
   x = 84,105,637.37/10,757.81
6. Step 6: Final answer
   x = 7,818.10