Finding the Third Proportional to 139,157 and 297,991

Step by Step Solution

1. Step 1: Write the proportion equation
   139,157 : 297,991 = 297,991 : x
2. Step 2: Convert to fraction form
   139,157/297,991 = 297,991/x
3. Step 3: Cross multiply
   139,157x = 297,991 × 297,991
4. Step 4: Simplify right side
   139,157x = 88,798,636,081
5. Step 5: Solve for x
   x = 88,798,636,081/139,157
6. Step 6: Final answer
   x = 638,118.36