Finding the Third Proportional to 64,718,844 and 139,042,990

Step by Step Solution

1. Step 1: Write the proportion equation
   64,718,844 : 139,042,990 = 139,042,990 : x
2. Step 2: Convert to fraction form
   64,718,844/139,042,990 = 139,042,990/x
3. Step 3: Cross multiply
   64,718,844x = 139,042,990 × 139,042,990
4. Step 4: Simplify right side
   64,718,844x = 19,332,953,068,140,100
5. Step 5: Solve for x
   x = 19,332,953,068,140,100/64,718,844
6. Step 6: Final answer
   x = 298,722,163.02