Finding the Third Proportional to 139,155 and 297,987

Step by Step Solution

1. Step 1: Write the proportion equation
   139,155 : 297,987 = 297,987 : x
2. Step 2: Convert to fraction form
   139,155/297,987 = 297,987/x
3. Step 3: Cross multiply
   139,155x = 297,987 × 297,987
4. Step 4: Simplify right side
   139,155x = 88,796,252,169
5. Step 5: Solve for x
   x = 88,796,252,169/139,155
6. Step 6: Final answer
   x = 638,110.40