Finding the Fourth Proportional to 17,165.58, 25,748.10 and 5,478.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,165.58 : 25,748.10 = 5,478.72 : x
2. Step 2: Convert to fraction form
   17,165.58/25,748.10 = 5,478.72/x
3. Step 3: Cross multiply
   17,165.58x = 25,748.10 × 5,478.72
4. Step 4: Simplify right side
   17,165.58x = 141,066,630.43
5. Step 5: Solve for x
   x = 141,066,630.43/17,165.58
6. Step 6: Final answer
   x = 8,217.99