Finding the Third Proportional to 83,061.75 and 128,858.25

Step by Step Solution

1. Step 1: Write the proportion equation
   83,061.75 : 128,858.25 = 128,858.25 : x
2. Step 2: Convert to fraction form
   83,061.75/128,858.25 = 128,858.25/x
3. Step 3: Cross multiply
   83,061.75x = 128,858.25 × 128,858.25
4. Step 4: Simplify right side
   83,061.75x = 16,604,448,593.06
5. Step 5: Solve for x
   x = 16,604,448,593.06/83,061.75
6. Step 6: Final answer
   x = 199,904.87