Finding the Fourth Proportional to 19,807.28, 29,710.31 and 8,111.69

Step by Step Solution

1. Step 1: Write the proportion equation
   19,807.28 : 29,710.31 = 8,111.69 : x
2. Step 2: Convert to fraction form
   19,807.28/29,710.31 = 8,111.69/x
3. Step 3: Cross multiply
   19,807.28x = 29,710.31 × 8,111.69
4. Step 4: Simplify right side
   19,807.28x = 241,000,824.52
5. Step 5: Solve for x
   x = 241,000,824.52/19,807.28
6. Step 6: Final answer
   x = 12,167.29