Finding the Third Proportional to 64,380,390 and 139,735,308

Step by Step Solution

1. Step 1: Write the proportion equation
   64,380,390 : 139,735,308 = 139,735,308 : x
2. Step 2: Convert to fraction form
   64,380,390/139,735,308 = 139,735,308/x
3. Step 3: Cross multiply
   64,380,390x = 139,735,308 × 139,735,308
4. Step 4: Simplify right side
   64,380,390x = 19,525,956,301,854,864
5. Step 5: Solve for x
   x = 19,525,956,301,854,864/64,380,390
6. Step 6: Final answer
   x = 303,290,432.10