Finding the Fourth Proportional to 20,648.57, 30,971.68 and 5,654.59

Step by Step Solution

1. Step 1: Write the proportion equation
   20,648.57 : 30,971.68 = 5,654.59 : x
2. Step 2: Convert to fraction form
   20,648.57/30,971.68 = 5,654.59/x
3. Step 3: Cross multiply
   20,648.57x = 30,971.68 × 5,654.59
4. Step 4: Simplify right side
   20,648.57x = 175,132,152.01
5. Step 5: Solve for x
   x = 175,132,152.01/20,648.57
6. Step 6: Final answer
   x = 8,481.56