Finding the Fourth Proportional to 19,786.42, 29,681.61 and 7,309.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,786.42 : 29,681.61 = 7,309.72 : x
2. Step 2: Convert to fraction form
   19,786.42/29,681.61 = 7,309.72/x
3. Step 3: Cross multiply
   19,786.42x = 29,681.61 × 7,309.72
4. Step 4: Simplify right side
   19,786.42x = 216,964,258.25
5. Step 5: Solve for x
   x = 216,964,258.25/19,786.42
6. Step 6: Final answer
   x = 10,965.31