Finding the Fourth Proportional to 17,018.42, 25,518.99 and 7,776.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,018.42 : 25,518.99 = 7,776.50 : x
2. Step 2: Convert to fraction form
   17,018.42/25,518.99 = 7,776.50/x
3. Step 3: Cross multiply
   17,018.42x = 25,518.99 × 7,776.50
4. Step 4: Simplify right side
   17,018.42x = 198,448,425.74
5. Step 5: Solve for x
   x = 198,448,425.74/17,018.42
6. Step 6: Final answer
   x = 11,660.80