Finding the Fourth Proportional to 10,917.72, 15,068.25 and 6,442.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,917.72 : 15,068.25 = 6,442.56 : x
2. Step 2: Convert to fraction form
   10,917.72/15,068.25 = 6,442.56/x
3. Step 3: Cross multiply
   10,917.72x = 15,068.25 × 6,442.56
4. Step 4: Simplify right side
   10,917.72x = 97,078,104.72
5. Step 5: Solve for x
   x = 97,078,104.72/10,917.72
6. Step 6: Final answer
   x = 8,891.79