Finding the Fourth Proportional to 10,359.86, 15,528.78 and 7,064.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,359.86 : 15,528.78 = 7,064.78 : x
2. Step 2: Convert to fraction form
   10,359.86/15,528.78 = 7,064.78/x
3. Step 3: Cross multiply
   10,359.86x = 15,528.78 × 7,064.78
4. Step 4: Simplify right side
   10,359.86x = 109,707,414.37
5. Step 5: Solve for x
   x = 109,707,414.37/10,359.86
6. Step 6: Final answer
   x = 10,589.66