Finding the Third Proportional to 91,006,020 and 128,770,740

Step by Step Solution

1. Step 1: Write the proportion equation
   91,006,020 : 128,770,740 = 128,770,740 : x
2. Step 2: Convert to fraction form
   91,006,020/128,770,740 = 128,770,740/x
3. Step 3: Cross multiply
   91,006,020x = 128,770,740 × 128,770,740
4. Step 4: Simplify right side
   91,006,020x = 16,581,903,480,147,600
5. Step 5: Solve for x
   x = 16,581,903,480,147,600/91,006,020
6. Step 6: Final answer
   x = 182,206,665.89