Finding the Third Proportional to 139,408 and 296,798

Step by Step Solution

1. Step 1: Write the proportion equation
   139,408 : 296,798 = 296,798 : x
2. Step 2: Convert to fraction form
   139,408/296,798 = 296,798/x
3. Step 3: Cross multiply
   139,408x = 296,798 × 296,798
4. Step 4: Simplify right side
   139,408x = 88,089,052,804
5. Step 5: Solve for x
   x = 88,089,052,804/139,408
6. Step 6: Final answer
   x = 631,879.47