Finding the Fourth Proportional to 10,579.78, 15,866.42 and 7,313.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,579.78 : 15,866.42 = 7,313.86 : x
2. Step 2: Convert to fraction form
   10,579.78/15,866.42 = 7,313.86/x
3. Step 3: Cross multiply
   10,579.78x = 15,866.42 × 7,313.86
4. Step 4: Simplify right side
   10,579.78x = 116,044,774.58
5. Step 5: Solve for x
   x = 116,044,774.58/10,579.78
6. Step 6: Final answer
   x = 10,968.54