Finding the Third Proportional to 90,784,867.50 and 188,029,512

Step by Step Solution

1. Step 1: Write the proportion equation
   90,784,867.50 : 188,029,512 = 188,029,512 : x
2. Step 2: Convert to fraction form
   90,784,867.50/188,029,512 = 188,029,512/x
3. Step 3: Cross multiply
   90,784,867.50x = 188,029,512 × 188,029,512
4. Step 4: Simplify right side
   90,784,867.50x = 35,355,097,382,958,144
5. Step 5: Solve for x
   x = 35,355,097,382,958,144/90,784,867.50
6. Step 6: Final answer
   x = 389,438,221.99