Finding the Third Proportional to 139,404 and 296,790

Step by Step Solution

1. Step 1: Write the proportion equation
   139,404 : 296,790 = 296,790 : x
2. Step 2: Convert to fraction form
   139,404/296,790 = 296,790/x
3. Step 3: Cross multiply
   139,404x = 296,790 × 296,790
4. Step 4: Simplify right side
   139,404x = 88,084,304,100
5. Step 5: Solve for x
   x = 88,084,304,100/139,404
6. Step 6: Final answer
   x = 631,863.53