Finding the Fourth Proportional to 8,708.46, 12,019.59 and 5,354.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,708.46 : 12,019.59 = 5,354.12 : x
2. Step 2: Convert to fraction form
   8,708.46/12,019.59 = 5,354.12/x
3. Step 3: Cross multiply
   8,708.46x = 12,019.59 × 5,354.12
4. Step 4: Simplify right side
   8,708.46x = 64,354,267.11
5. Step 5: Solve for x
   x = 64,354,267.11/8,708.46
6. Step 6: Final answer
   x = 7,389.86