Finding the Fourth Proportional to 8,978.62, 12,349.38 and 7,206.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.62 : 12,349.38 = 7,206.34 : x
2. Step 2: Convert to fraction form
   8,978.62/12,349.38 = 7,206.34/x
3. Step 3: Cross multiply
   8,978.62x = 12,349.38 × 7,206.34
4. Step 4: Simplify right side
   8,978.62x = 88,993,831.07
5. Step 5: Solve for x
   x = 88,993,831.07/8,978.62
6. Step 6: Final answer
   x = 9,911.75