Finding the Third Proportional to 3,672,138 and 7,642,317

Step by Step Solution

1. Step 1: Write the proportion equation
   3,672,138 : 7,642,317 = 7,642,317 : x
2. Step 2: Convert to fraction form
   3,672,138/7,642,317 = 7,642,317/x
3. Step 3: Cross multiply
   3,672,138x = 7,642,317 × 7,642,317
4. Step 4: Simplify right side
   3,672,138x = 58,405,009,128,489
5. Step 5: Solve for x
   x = 58,405,009,128,489/3,672,138
6. Step 6: Final answer
   x = 15,904,905.84