Finding the Fourth Proportional to 25,419, 35,069.82 and 15,343.62

Step by Step Solution

1. Step 1: Write the proportion equation
   25,419 : 35,069.82 = 15,343.62 : x
2. Step 2: Convert to fraction form
   25,419/35,069.82 = 15,343.62/x
3. Step 3: Cross multiply
   25,419x = 35,069.82 × 15,343.62
4. Step 4: Simplify right side
   25,419x = 538,097,991.55
5. Step 5: Solve for x
   x = 538,097,991.55/25,419
6. Step 6: Final answer
   x = 21,169.13