Finding the Fourth Proportional to 14,145.15, 19,520.27 and 7,770.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,145.15 : 19,520.27 = 7,770.72 : x
2. Step 2: Convert to fraction form
   14,145.15/19,520.27 = 7,770.72/x
3. Step 3: Cross multiply
   14,145.15x = 19,520.27 × 7,770.72
4. Step 4: Simplify right side
   14,145.15x = 151,686,552.49
5. Step 5: Solve for x
   x = 151,686,552.49/14,145.15
6. Step 6: Final answer
   x = 10,723.57