Finding the Fourth Proportional to 12,901.27, 17,805.74 and 7,238.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,901.27 : 17,805.74 = 7,238.31 : x
2. Step 2: Convert to fraction form
   12,901.27/17,805.74 = 7,238.31/x
3. Step 3: Cross multiply
   12,901.27x = 17,805.74 × 7,238.31
4. Step 4: Simplify right side
   12,901.27x = 128,883,465.90
5. Step 5: Solve for x
   x = 128,883,465.90/12,901.27
6. Step 6: Final answer
   x = 9,989.98