Finding the Fourth Proportional to 9,392.31, 12,946.50 and 7,399.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,392.31 : 12,946.50 = 7,399.71 : x
2. Step 2: Convert to fraction form
   9,392.31/12,946.50 = 7,399.71/x
3. Step 3: Cross multiply
   9,392.31x = 12,946.50 × 7,399.71
4. Step 4: Simplify right side
   9,392.31x = 95,800,345.52
5. Step 5: Solve for x
   x = 95,800,345.52/9,392.31
6. Step 6: Final answer
   x = 10,199.87