Finding the Third Proportional to 63,909,490 and 139,776,440

Step by Step Solution

1. Step 1: Write the proportion equation
   63,909,490 : 139,776,440 = 139,776,440 : x
2. Step 2: Convert to fraction form
   63,909,490/139,776,440 = 139,776,440/x
3. Step 3: Cross multiply
   63,909,490x = 139,776,440 × 139,776,440
4. Step 4: Simplify right side
   63,909,490x = 19,537,453,179,073,600
5. Step 5: Solve for x
   x = 19,537,453,179,073,600/63,909,490
6. Step 6: Final answer
   x = 305,705,039.72