Finding the Fourth Proportional to 8,292.96, 12,378.42 and 7,308.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,292.96 : 12,378.42 = 7,308.72 : x
2. Step 2: Convert to fraction form
   8,292.96/12,378.42 = 7,308.72/x
3. Step 3: Cross multiply
   8,292.96x = 12,378.42 × 7,308.72
4. Step 4: Simplify right side
   8,292.96x = 90,470,405.82
5. Step 5: Solve for x
   x = 90,470,405.82/8,292.96
6. Step 6: Final answer
   x = 10,909.30