Finding the Fourth Proportional to 21,619.62, 32,422.10 and 10,519.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,619.62 : 32,422.10 = 10,519.25 : x
2. Step 2: Convert to fraction form
   21,619.62/32,422.10 = 10,519.25/x
3. Step 3: Cross multiply
   21,619.62x = 32,422.10 × 10,519.25
4. Step 4: Simplify right side
   21,619.62x = 341,055,960.72
5. Step 5: Solve for x
   x = 341,055,960.72/21,619.62
6. Step 6: Final answer
   x = 15,775.30