Finding the Fourth Proportional to 10,500.81, 15,718.62 and 7,852.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,500.81 : 15,718.62 = 7,852.71 : x
2. Step 2: Convert to fraction form
   10,500.81/15,718.62 = 7,852.71/x
3. Step 3: Cross multiply
   10,500.81x = 15,718.62 × 7,852.71
4. Step 4: Simplify right side
   10,500.81x = 123,433,764.46
5. Step 5: Solve for x
   x = 123,433,764.46/10,500.81
6. Step 6: Final answer
   x = 11,754.69