Finding the Third Proportional to 86,602.50 and 188,878.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,602.50 : 188,878.50 = 188,878.50 : x
2. Step 2: Convert to fraction form
   86,602.50/188,878.50 = 188,878.50/x
3. Step 3: Cross multiply
   86,602.50x = 188,878.50 × 188,878.50
4. Step 4: Simplify right side
   86,602.50x = 35,675,087,762.25
5. Step 5: Solve for x
   x = 35,675,087,762.25/86,602.50
6. Step 6: Final answer
   x = 411,940.62