Finding the Third Proportional to 91,005,889.50 and 128,770,544.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91,005,889.50 : 128,770,544.25 = 128,770,544.25 : x
2. Step 2: Convert to fraction form
   91,005,889.50/128,770,544.25 = 128,770,544.25/x
3. Step 3: Cross multiply
   91,005,889.50x = 128,770,544.25 × 128,770,544.25
4. Step 4: Simplify right side
   91,005,889.50x = 16,581,853,066,441,208
5. Step 5: Solve for x
   x = 16,581,853,066,441,208/91,005,889.50
6. Step 6: Final answer
   x = 182,206,373.21