Finding the Third Proportional to 76,572,036 and 168,021,990

Step by Step Solution

1. Step 1: Write the proportion equation
   76,572,036 : 168,021,990 = 168,021,990 : x
2. Step 2: Convert to fraction form
   76,572,036/168,021,990 = 168,021,990/x
3. Step 3: Cross multiply
   76,572,036x = 168,021,990 × 168,021,990
4. Step 4: Simplify right side
   76,572,036x = 28,231,389,123,560,100
5. Step 5: Solve for x
   x = 28,231,389,123,560,100/76,572,036
6. Step 6: Final answer
   x = 368,690,589.91