Finding the Fourth Proportional to 21,670.56, 32,505.78 and 8,164.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,670.56 : 32,505.78 = 8,164.23 : x
2. Step 2: Convert to fraction form
   21,670.56/32,505.78 = 8,164.23/x
3. Step 3: Cross multiply
   21,670.56x = 32,505.78 × 8,164.23
4. Step 4: Simplify right side
   21,670.56x = 265,384,664.25
5. Step 5: Solve for x
   x = 265,384,664.25/21,670.56
6. Step 6: Final answer
   x = 12,246.32