Finding the Fourth Proportional to 17,019.42, 25,520.49 and 7,777.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,019.42 : 25,520.49 = 7,777.50 : x
2. Step 2: Convert to fraction form
   17,019.42/25,520.49 = 7,777.50/x
3. Step 3: Cross multiply
   17,019.42x = 25,520.49 × 7,777.50
4. Step 4: Simplify right side
   17,019.42x = 198,485,610.98
5. Step 5: Solve for x
   x = 198,485,610.98/17,019.42
6. Step 6: Final answer
   x = 11,662.30