Finding the Fourth Proportional to 67,664.73, 101,506.82 and 20,921.25

Step by Step Solution

1. Step 1: Write the proportion equation
   67,664.73 : 101,506.82 = 20,921.25 : x
2. Step 2: Convert to fraction form
   67,664.73/101,506.82 = 20,921.25/x
3. Step 3: Cross multiply
   67,664.73x = 101,506.82 × 20,921.25
4. Step 4: Simplify right side
   67,664.73x = 2,123,649,557.93
5. Step 5: Solve for x
   x = 2,123,649,557.93/67,664.73
6. Step 6: Final answer
   x = 31,384.88