Finding the Third Proportional to 85,984,809,400 and 128,231,563,690

Step by Step Solution

1. Step 1: Write the proportion equation
   85,984,809,400 : 128,231,563,690 = 128,231,563,690 : x
2. Step 2: Convert to fraction form
   85,984,809,400/128,231,563,690 = 128,231,563,690/x
3. Step 3: Cross multiply
   85,984,809,400x = 128,231,563,690 × 128,231,563,690
4. Step 4: Simplify right side
   85,984,809,400x = 16,443,333,926,382,525,743,104
5. Step 5: Solve for x
   x = 16,443,333,926,382,525,743,104/85,984,809,400
6. Step 6: Final answer
   x = 191,235,336,114.88