Finding the Third Proportional to 138,221,802 and 298,611,036

Step by Step Solution

1. Step 1: Write the proportion equation
   138,221,802 : 298,611,036 = 298,611,036 : x
2. Step 2: Convert to fraction form
   138,221,802/298,611,036 = 298,611,036/x
3. Step 3: Cross multiply
   138,221,802x = 298,611,036 × 298,611,036
4. Step 4: Simplify right side
   138,221,802x = 89,168,550,820,993,296
5. Step 5: Solve for x
   x = 89,168,550,820,993,296/138,221,802
6. Step 6: Final answer
   x = 645,112,055.63