Finding the Third Proportional to 86,064.75 and 186,428.25

Step by Step Solution

1. Step 1: Write the proportion equation
   86,064.75 : 186,428.25 = 186,428.25 : x
2. Step 2: Convert to fraction form
   86,064.75/186,428.25 = 186,428.25/x
3. Step 3: Cross multiply
   86,064.75x = 186,428.25 × 186,428.25
4. Step 4: Simplify right side
   86,064.75x = 34,755,492,398.06
5. Step 5: Solve for x
   x = 34,755,492,398.06/86,064.75
6. Step 6: Final answer
   x = 403,829.59