Finding the Third Proportional to 3,990,628,645.50 and 5,612,552,186.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,628,645.50 : 5,612,552,186.50 = 5,612,552,186.50 : x
2. Step 2: Convert to fraction form
   3,990,628,645.50/5,612,552,186.50 = 5,612,552,186.50/x
3. Step 3: Cross multiply
   3,990,628,645.50x = 5,612,552,186.50 × 5,612,552,186.50
4. Step 4: Simplify right side
   3,990,628,645.50x = 31,500,742,046,185,930,752
5. Step 5: Solve for x
   x = 31,500,742,046,185,930,752/3,990,628,645.50
6. Step 6: Final answer
   x = 7,893,679,127.90