Finding the Third Proportional to 91,005,892 and 128,770,547

Step by Step Solution

1. Step 1: Write the proportion equation
   91,005,892 : 128,770,547 = 128,770,547 : x
2. Step 2: Convert to fraction form
   91,005,892/128,770,547 = 128,770,547/x
3. Step 3: Cross multiply
   91,005,892x = 128,770,547 × 128,770,547
4. Step 4: Simplify right side
   91,005,892x = 16,581,853,774,679,208
5. Step 5: Solve for x
   x = 16,581,853,774,679,208/91,005,892
6. Step 6: Final answer
   x = 182,206,375.99