Finding the Fourth Proportional to 9,316.78, 12,859.90 and 5,542.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,316.78 : 12,859.90 = 5,542.62 : x
2. Step 2: Convert to fraction form
   9,316.78/12,859.90 = 5,542.62/x
3. Step 3: Cross multiply
   9,316.78x = 12,859.90 × 5,542.62
4. Step 4: Simplify right side
   9,316.78x = 71,277,538.94
5. Step 5: Solve for x
   x = 71,277,538.94/9,316.78
6. Step 6: Final answer
   x = 7,650.45