Finding the Fourth Proportional to 8,663.40, 12,984.72 and 3,395.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,663.40 : 12,984.72 = 3,395.12 : x
2. Step 2: Convert to fraction form
   8,663.40/12,984.72 = 3,395.12/x
3. Step 3: Cross multiply
   8,663.40x = 12,984.72 × 3,395.12
4. Step 4: Simplify right side
   8,663.40x = 44,084,665.59
5. Step 5: Solve for x
   x = 44,084,665.59/8,663.40
6. Step 6: Final answer
   x = 5,088.61