Finding the Fourth Proportional to 14,145.34, 19,519.42 and 7,771.78

Step by Step Solution

1. Step 1: Write the proportion equation
   14,145.34 : 19,519.42 = 7,771.78 : x
2. Step 2: Convert to fraction form
   14,145.34/19,519.42 = 7,771.78/x
3. Step 3: Cross multiply
   14,145.34x = 19,519.42 × 7,771.78
4. Step 4: Simplify right side
   14,145.34x = 151,700,637.97
5. Step 5: Solve for x
   x = 151,700,637.97/14,145.34
6. Step 6: Final answer
   x = 10,724.43