Finding the Fourth Proportional to 8,445.86, 11,647.71 and 5,458.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,445.86 : 11,647.71 = 5,458.56 : x
2. Step 2: Convert to fraction form
   8,445.86/11,647.71 = 5,458.56/x
3. Step 3: Cross multiply
   8,445.86x = 11,647.71 × 5,458.56
4. Step 4: Simplify right side
   8,445.86x = 63,579,723.90
5. Step 5: Solve for x
   x = 63,579,723.90/8,445.86
6. Step 6: Final answer
   x = 7,527.92