Finding the Fourth Proportional to 14,319.72, 21,456.50 and 7,749

Step by Step Solution

1. Step 1: Write the proportion equation
   14,319.72 : 21,456.50 = 7,749 : x
2. Step 2: Convert to fraction form
   14,319.72/21,456.50 = 7,749/x
3. Step 3: Cross multiply
   14,319.72x = 21,456.50 × 7,749
4. Step 4: Simplify right side
   14,319.72x = 166,266,379.76
5. Step 5: Solve for x
   x = 166,266,379.76/14,319.72
6. Step 6: Final answer
   x = 11,611.01