Finding the Third Proportional to 86,601,297.50 and 188,447,915

Step by Step Solution

1. Step 1: Write the proportion equation
   86,601,297.50 : 188,447,915 = 188,447,915 : x
2. Step 2: Convert to fraction form
   86,601,297.50/188,447,915 = 188,447,915/x
3. Step 3: Cross multiply
   86,601,297.50x = 188,447,915 × 188,447,915
4. Step 4: Simplify right side
   86,601,297.50x = 35,512,616,667,847,224
5. Step 5: Solve for x
   x = 35,512,616,667,847,224/86,601,297.50
6. Step 6: Final answer
   x = 410,070,260.99