Finding the Third Proportional to 469,137,407 and 636,427,410

Step by Step Solution

1. Step 1: Write the proportion equation
   469,137,407 : 636,427,410 = 636,427,410 : x
2. Step 2: Convert to fraction form
   469,137,407/636,427,410 = 636,427,410/x
3. Step 3: Cross multiply
   469,137,407x = 636,427,410 × 636,427,410
4. Step 4: Simplify right side
   469,137,407x = 405,039,848,199,308,096
5. Step 5: Solve for x
   x = 405,039,848,199,308,096/469,137,407
6. Step 6: Final answer
   x = 863,371,460.38