Finding the Fourth Proportional to 5,431.72, 8,144.82 and 2,654.24

Step by Step Solution

1. Step 1: Write the proportion equation
   5,431.72 : 8,144.82 = 2,654.24 : x
2. Step 2: Convert to fraction form
   5,431.72/8,144.82 = 2,654.24/x
3. Step 3: Cross multiply
   5,431.72x = 8,144.82 × 2,654.24
4. Step 4: Simplify right side
   5,431.72x = 21,618,307.04
5. Step 5: Solve for x
   x = 21,618,307.04/5,431.72
6. Step 6: Final answer
   x = 3,980.01