Finding the Third Proportional to 89,391,332 and 136,686,128

Step by Step Solution

1. Step 1: Write the proportion equation
   89,391,332 : 136,686,128 = 136,686,128 : x
2. Step 2: Convert to fraction form
   89,391,332/136,686,128 = 136,686,128/x
3. Step 3: Cross multiply
   89,391,332x = 136,686,128 × 136,686,128
4. Step 4: Simplify right side
   89,391,332x = 18,683,097,587,632,384
5. Step 5: Solve for x
   x = 18,683,097,587,632,384/89,391,332
6. Step 6: Final answer
   x = 209,003,458.94