Finding the Fourth Proportional to 21,411.03, 32,081.99 and 13,185.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,411.03 : 32,081.99 = 13,185.75 : x
2. Step 2: Convert to fraction form
   21,411.03/32,081.99 = 13,185.75/x
3. Step 3: Cross multiply
   21,411.03x = 32,081.99 × 13,185.75
4. Step 4: Simplify right side
   21,411.03x = 423,025,033.71
5. Step 5: Solve for x
   x = 423,025,033.71/21,411.03
6. Step 6: Final answer
   x = 19,757.34