Finding the Fourth Proportional to 25,815, 35,605.20 and 17,870.52

Step by Step Solution

1. Step 1: Write the proportion equation
   25,815 : 35,605.20 = 17,870.52 : x
2. Step 2: Convert to fraction form
   25,815/35,605.20 = 17,870.52/x
3. Step 3: Cross multiply
   25,815x = 35,605.20 × 17,870.52
4. Step 4: Simplify right side
   25,815x = 636,283,438.70
5. Step 5: Solve for x
   x = 636,283,438.70/25,815
6. Step 6: Final answer
   x = 24,647.82