Finding the Fourth Proportional to 21,725.56, 29,961.18 and 13,754.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,725.56 : 29,961.18 = 13,754.20 : x
2. Step 2: Convert to fraction form
   21,725.56/29,961.18 = 13,754.20/x
3. Step 3: Cross multiply
   21,725.56x = 29,961.18 × 13,754.20
4. Step 4: Simplify right side
   21,725.56x = 412,092,061.96
5. Step 5: Solve for x
   x = 412,092,061.96/21,725.56
6. Step 6: Final answer
   x = 18,968.08