Finding the Third Proportional to 87,868,638 and 188,961,012

Step by Step Solution

1. Step 1: Write the proportion equation
   87,868,638 : 188,961,012 = 188,961,012 : x
2. Step 2: Convert to fraction form
   87,868,638/188,961,012 = 188,961,012/x
3. Step 3: Cross multiply
   87,868,638x = 188,961,012 × 188,961,012
4. Step 4: Simplify right side
   87,868,638x = 35,706,264,056,064,144
5. Step 5: Solve for x
   x = 35,706,264,056,064,144/87,868,638
6. Step 6: Final answer
   x = 406,359,593.92