Finding the Third Proportional to 138,402 and 298,998

Step by Step Solution

1. Step 1: Write the proportion equation
   138,402 : 298,998 = 298,998 : x
2. Step 2: Convert to fraction form
   138,402/298,998 = 298,998/x
3. Step 3: Cross multiply
   138,402x = 298,998 × 298,998
4. Step 4: Simplify right side
   138,402x = 89,399,804,004
5. Step 5: Solve for x
   x = 89,399,804,004/138,402
6. Step 6: Final answer
   x = 645,943.01