Finding the Third Proportional to 89,488,910 and 138,189,573

Step by Step Solution

1. Step 1: Write the proportion equation
   89,488,910 : 138,189,573 = 138,189,573 : x
2. Step 2: Convert to fraction form
   89,488,910/138,189,573 = 138,189,573/x
3. Step 3: Cross multiply
   89,488,910x = 138,189,573 × 138,189,573
4. Step 4: Simplify right side
   89,488,910x = 19,096,358,085,922,328
5. Step 5: Solve for x
   x = 19,096,358,085,922,328/89,488,910
6. Step 6: Final answer
   x = 213,393,571.18