Finding the Third Proportional to 139,156 and 297,989

Step by Step Solution

1. Step 1: Write the proportion equation
   139,156 : 297,989 = 297,989 : x
2. Step 2: Convert to fraction form
   139,156/297,989 = 297,989/x
3. Step 3: Cross multiply
   139,156x = 297,989 × 297,989
4. Step 4: Simplify right side
   139,156x = 88,797,444,121
5. Step 5: Solve for x
   x = 88,797,444,121/139,156
6. Step 6: Final answer
   x = 638,114.38