Finding the Third Proportional to 91,991,799 and 186,686,730

Step by Step Solution

1. Step 1: Write the proportion equation
   91,991,799 : 186,686,730 = 186,686,730 : x
2. Step 2: Convert to fraction form
   91,991,799/186,686,730 = 186,686,730/x
3. Step 3: Cross multiply
   91,991,799x = 186,686,730 × 186,686,730
4. Step 4: Simplify right side
   91,991,799x = 34,851,935,158,092,900
5. Step 5: Solve for x
   x = 34,851,935,158,092,900/91,991,799
6. Step 6: Final answer
   x = 378,859,154.15