Finding the Fourth Proportional to 12,816.32, 17,686.51 and 7,227.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,816.32 : 17,686.51 = 7,227.32 : x
2. Step 2: Convert to fraction form
   12,816.32/17,686.51 = 7,227.32/x
3. Step 3: Cross multiply
   12,816.32x = 17,686.51 × 7,227.32
4. Step 4: Simplify right side
   12,816.32x = 127,826,067.45
5. Step 5: Solve for x
   x = 127,826,067.45/12,816.32
6. Step 6: Final answer
   x = 9,973.70