Finding the Third Proportional to 64,721,902 and 139,048,856

Step by Step Solution

1. Step 1: Write the proportion equation
   64,721,902 : 139,048,856 = 139,048,856 : x
2. Step 2: Convert to fraction form
   64,721,902/139,048,856 = 139,048,856/x
3. Step 3: Cross multiply
   64,721,902x = 139,048,856 × 139,048,856
4. Step 4: Simplify right side
   64,721,902x = 19,334,584,354,908,736
5. Step 5: Solve for x
   x = 19,334,584,354,908,736/64,721,902
6. Step 6: Final answer
   x = 298,733,253.47