Finding the Fourth Proportional to 9,404.92, 12,976.98 and 5,426.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.92 : 12,976.98 = 5,426.20 : x
2. Step 2: Convert to fraction form
   9,404.92/12,976.98 = 5,426.20/x
3. Step 3: Cross multiply
   9,404.92x = 12,976.98 × 5,426.20
4. Step 4: Simplify right side
   9,404.92x = 70,415,688.88
5. Step 5: Solve for x
   x = 70,415,688.88/9,404.92
6. Step 6: Final answer
   x = 7,487.11