Finding the Third Proportional to 21,051.75 and 29,777.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,051.75 : 29,777.25 = 29,777.25 : x
2. Step 2: Convert to fraction form
   21,051.75/29,777.25 = 29,777.25/x
3. Step 3: Cross multiply
   21,051.75x = 29,777.25 × 29,777.25
4. Step 4: Simplify right side
   21,051.75x = 886,684,617.56
5. Step 5: Solve for x
   x = 886,684,617.56/21,051.75
6. Step 6: Final answer
   x = 42,119.28