Finding the Fourth Proportional to 11,005.06, 16,499.39 and 6,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,005.06 : 16,499.39 = 6,621.50 : x
2. Step 2: Convert to fraction form
   11,005.06/16,499.39 = 6,621.50/x
3. Step 3: Cross multiply
   11,005.06x = 16,499.39 × 6,621.50
4. Step 4: Simplify right side
   11,005.06x = 109,250,710.89
5. Step 5: Solve for x
   x = 109,250,710.89/11,005.06
6. Step 6: Final answer
   x = 9,927.32