Finding the Fourth Proportional to 25,826, 35,634.38 and 15,211.76

Step by Step Solution

1. Step 1: Write the proportion equation
   25,826 : 35,634.38 = 15,211.76 : x
2. Step 2: Convert to fraction form
   25,826/35,634.38 = 15,211.76/x
3. Step 3: Cross multiply
   25,826x = 35,634.38 × 15,211.76
4. Step 4: Simplify right side
   25,826x = 542,061,636.31
5. Step 5: Solve for x
   x = 542,061,636.31/25,826
6. Step 6: Final answer
   x = 20,988.99