Finding the Third Proportional to 713,390 and 978,229

Step by Step Solution

1. Step 1: Write the proportion equation
   713,390 : 978,229 = 978,229 : x
2. Step 2: Convert to fraction form
   713,390/978,229 = 978,229/x
3. Step 3: Cross multiply
   713,390x = 978,229 × 978,229
4. Step 4: Simplify right side
   713,390x = 956,931,976,441
5. Step 5: Solve for x
   x = 956,931,976,441/713,390
6. Step 6: Final answer
   x = 1,341,386.87