Finding the Fourth Proportional to 9,665.07, 13,345.34 and 7,423.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,665.07 : 13,345.34 = 7,423.40 : x
2. Step 2: Convert to fraction form
   9,665.07/13,345.34 = 7,423.40/x
3. Step 3: Cross multiply
   9,665.07x = 13,345.34 × 7,423.40
4. Step 4: Simplify right side
   9,665.07x = 99,067,693.11
5. Step 5: Solve for x
   x = 99,067,693.11/9,665.07
6. Step 6: Final answer
   x = 10,250.08