Finding the Third Proportional to 91,005,900 and 128,770,558

Step by Step Solution

1. Step 1: Write the proportion equation
   91,005,900 : 128,770,558 = 128,770,558 : x
2. Step 2: Convert to fraction form
   91,005,900/128,770,558 = 128,770,558/x
3. Step 3: Cross multiply
   91,005,900x = 128,770,558 × 128,770,558
4. Step 4: Simplify right side
   91,005,900x = 16,581,856,607,631,364
5. Step 5: Solve for x
   x = 16,581,856,607,631,364/91,005,900
6. Step 6: Final answer
   x = 182,206,391.10