Finding the Fourth Proportional to 9,345.27, 12,897.36 and 6,983.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,345.27 : 12,897.36 = 6,983.31 : x
2. Step 2: Convert to fraction form
   9,345.27/12,897.36 = 6,983.31/x
3. Step 3: Cross multiply
   9,345.27x = 12,897.36 × 6,983.31
4. Step 4: Simplify right side
   9,345.27x = 90,066,263.06
5. Step 5: Solve for x
   x = 90,066,263.06/9,345.27
6. Step 6: Final answer
   x = 9,637.63