Finding the Fourth Proportional to 21,786.28, 32,659.98 and 10,083.40

Step by Step Solution

1. Step 1: Write the proportion equation
   21,786.28 : 32,659.98 = 10,083.40 : x
2. Step 2: Convert to fraction form
   21,786.28/32,659.98 = 10,083.40/x
3. Step 3: Cross multiply
   21,786.28x = 32,659.98 × 10,083.40
4. Step 4: Simplify right side
   21,786.28x = 329,323,642.33
5. Step 5: Solve for x
   x = 329,323,642.33/21,786.28
6. Step 6: Final answer
   x = 15,116.10