Finding the Fourth Proportional to 25,671.89, 38,454.17 and 20,647.10

Step by Step Solution

1. Step 1: Write the proportion equation
   25,671.89 : 38,454.17 = 20,647.10 : x
2. Step 2: Convert to fraction form
   25,671.89/38,454.17 = 20,647.10/x
3. Step 3: Cross multiply
   25,671.89x = 38,454.17 × 20,647.10
4. Step 4: Simplify right side
   25,671.89x = 793,967,241.16
5. Step 5: Solve for x
   x = 793,967,241.16/25,671.89
6. Step 6: Final answer
   x = 30,927.49