Finding the Fourth Proportional to 10,527.98, 15,778.31 and 4,280.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,527.98 : 15,778.31 = 4,280.72 : x
2. Step 2: Convert to fraction form
   10,527.98/15,778.31 = 4,280.72/x
3. Step 3: Cross multiply
   10,527.98x = 15,778.31 × 4,280.72
4. Step 4: Simplify right side
   10,527.98x = 67,542,426.89
5. Step 5: Solve for x
   x = 67,542,426.89/10,527.98
6. Step 6: Final answer
   x = 6,415.52