Finding the Fourth Proportional to 8,443.17, 12,663.42 and 5,313.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,443.17 : 12,663.42 = 5,313.60 : x
2. Step 2: Convert to fraction form
   8,443.17/12,663.42 = 5,313.60/x
3. Step 3: Cross multiply
   8,443.17x = 12,663.42 × 5,313.60
4. Step 4: Simplify right side
   8,443.17x = 67,288,348.51
5. Step 5: Solve for x
   x = 67,288,348.51/8,443.17
6. Step 6: Final answer
   x = 7,969.56