Finding the Fourth Proportional to 10,786.47, 16,156.29 and 5,228.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,786.47 : 16,156.29 = 5,228.15 : x
2. Step 2: Convert to fraction form
   10,786.47/16,156.29 = 5,228.15/x
3. Step 3: Cross multiply
   10,786.47x = 16,156.29 × 5,228.15
4. Step 4: Simplify right side
   10,786.47x = 84,467,446.39
5. Step 5: Solve for x
   x = 84,467,446.39/10,786.47
6. Step 6: Final answer
   x = 7,830.87