Finding the Fourth Proportional to 25,582.72, 35,294.79 and 15,503.89

Step by Step Solution

1. Step 1: Write the proportion equation
   25,582.72 : 35,294.79 = 15,503.89 : x
2. Step 2: Convert to fraction form
   25,582.72/35,294.79 = 15,503.89/x
3. Step 3: Cross multiply
   25,582.72x = 35,294.79 × 15,503.89
4. Step 4: Simplify right side
   25,582.72x = 547,206,541.73
5. Step 5: Solve for x
   x = 547,206,541.73/25,582.72
6. Step 6: Final answer
   x = 21,389.69