Finding the Fourth Proportional to 25,902.86, 38,678.56 and 20,578.10

Step by Step Solution

1. Step 1: Write the proportion equation
   25,902.86 : 38,678.56 = 20,578.10 : x
2. Step 2: Convert to fraction form
   25,902.86/38,678.56 = 20,578.10/x
3. Step 3: Cross multiply
   25,902.86x = 38,678.56 × 20,578.10
4. Step 4: Simplify right side
   25,902.86x = 795,931,275.54
5. Step 5: Solve for x
   x = 795,931,275.54/25,902.86
6. Step 6: Final answer
   x = 30,727.54