Finding the Fourth Proportional to 11,926.98, 16,459.50 and 6,621.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,926.98 : 16,459.50 = 6,621.72 : x
2. Step 2: Convert to fraction form
   11,926.98/16,459.50 = 6,621.72/x
3. Step 3: Cross multiply
   11,926.98x = 16,459.50 × 6,621.72
4. Step 4: Simplify right side
   11,926.98x = 108,990,200.34
5. Step 5: Solve for x
   x = 108,990,200.34/11,926.98
6. Step 6: Final answer
   x = 9,138.12