Finding the Third Proportional to 81,118,506 and 123,720,912

Step by Step Solution

1. Step 1: Write the proportion equation
   81,118,506 : 123,720,912 = 123,720,912 : x
2. Step 2: Convert to fraction form
   81,118,506/123,720,912 = 123,720,912/x
3. Step 3: Cross multiply
   81,118,506x = 123,720,912 × 123,720,912
4. Step 4: Simplify right side
   81,118,506x = 15,306,864,066,111,744
5. Step 5: Solve for x
   x = 15,306,864,066,111,744/81,118,506
6. Step 6: Final answer
   x = 188,697,558.93