Finding the Third Proportional to 31,428 and 63,767.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,428 : 63,767.25 = 63,767.25 : x
2. Step 2: Convert to fraction form
   31,428/63,767.25 = 63,767.25/x
3. Step 3: Cross multiply
   31,428x = 63,767.25 × 63,767.25
4. Step 4: Simplify right side
   31,428x = 4,066,262,172.56
5. Step 5: Solve for x
   x = 4,066,262,172.56/31,428
6. Step 6: Final answer
   x = 129,383.42