Finding the Third Proportional to 86,243.63 and 188,518.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,243.63 : 188,518.50 = 188,518.50 : x
2. Step 2: Convert to fraction form
   86,243.63/188,518.50 = 188,518.50/x
3. Step 3: Cross multiply
   86,243.63x = 188,518.50 × 188,518.50
4. Step 4: Simplify right side
   86,243.63x = 35,539,224,842.25
5. Step 5: Solve for x
   x = 35,539,224,842.25/86,243.63
6. Step 6: Final answer
   x = 412,079.44