Finding the Third Proportional to 89,391,330 and 136,686,123

Step by Step Solution

1. Step 1: Write the proportion equation
   89,391,330 : 136,686,123 = 136,686,123 : x
2. Step 2: Convert to fraction form
   89,391,330/136,686,123 = 136,686,123/x
3. Step 3: Cross multiply
   89,391,330x = 136,686,123 × 136,686,123
4. Step 4: Simplify right side
   89,391,330x = 18,683,096,220,771,128
5. Step 5: Solve for x
   x = 18,683,096,220,771,128/89,391,330
6. Step 6: Final answer
   x = 209,003,448.33