Finding the Fourth Proportional to 10,995.86, 15,174.78 and 7,812.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,995.86 : 15,174.78 = 7,812.56 : x
2. Step 2: Convert to fraction form
   10,995.86/15,174.78 = 7,812.56/x
3. Step 3: Cross multiply
   10,995.86x = 15,174.78 × 7,812.56
4. Step 4: Simplify right side
   10,995.86x = 118,553,879.24
5. Step 5: Solve for x
   x = 118,553,879.24/10,995.86
6. Step 6: Final answer
   x = 10,781.68