Finding the Fourth Proportional to 21,673, 32,518.89 and 7,643.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,673 : 32,518.89 = 7,643.05 : x
2. Step 2: Convert to fraction form
   21,673/32,518.89 = 7,643.05/x
3. Step 3: Cross multiply
   21,673x = 32,518.89 × 7,643.05
4. Step 4: Simplify right side
   21,673x = 248,543,502.21
5. Step 5: Solve for x
   x = 248,543,502.21/21,673
6. Step 6: Final answer
   x = 11,467.89