Finding the Fourth Proportional to 10,865.75, 16,282.89 and 5,312.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,865.75 : 16,282.89 = 5,312.82 : x
2. Step 2: Convert to fraction form
   10,865.75/16,282.89 = 5,312.82/x
3. Step 3: Cross multiply
   10,865.75x = 16,282.89 × 5,312.82
4. Step 4: Simplify right side
   10,865.75x = 86,508,063.65
5. Step 5: Solve for x
   x = 86,508,063.65/10,865.75
6. Step 6: Final answer
   x = 7,961.54