Finding the Fourth Proportional to 10,559.72, 15,835.98 and 4,318.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,559.72 : 15,835.98 = 4,318.76 : x
2. Step 2: Convert to fraction form
   10,559.72/15,835.98 = 4,318.76/x
3. Step 3: Cross multiply
   10,559.72x = 15,835.98 × 4,318.76
4. Step 4: Simplify right side
   10,559.72x = 68,391,796.98
5. Step 5: Solve for x
   x = 68,391,796.98/10,559.72
6. Step 6: Final answer
   x = 6,476.67