Finding the Third Proportional to 67,484,928 and 139,755,408

Step by Step Solution

1. Step 1: Write the proportion equation
   67,484,928 : 139,755,408 = 139,755,408 : x
2. Step 2: Convert to fraction form
   67,484,928/139,755,408 = 139,755,408/x
3. Step 3: Cross multiply
   67,484,928x = 139,755,408 × 139,755,408
4. Step 4: Simplify right side
   67,484,928x = 19,531,574,065,246,464
5. Step 5: Solve for x
   x = 19,531,574,065,246,464/67,484,928
6. Step 6: Final answer
   x = 289,421,277.37