Finding the Third Proportional to 90,784,890.50 and 188,029,558

Step by Step Solution

1. Step 1: Write the proportion equation
   90,784,890.50 : 188,029,558 = 188,029,558 : x
2. Step 2: Convert to fraction form
   90,784,890.50/188,029,558 = 188,029,558/x
3. Step 3: Cross multiply
   90,784,890.50x = 188,029,558 × 188,029,558
4. Step 4: Simplify right side
   90,784,890.50x = 35,355,114,681,675,364
5. Step 5: Solve for x
   x = 35,355,114,681,675,364/90,784,890.50
6. Step 6: Final answer
   x = 389,438,313.88