Finding the Third Proportional to 619,423 and 978,992

Step by Step Solution

1. Step 1: Write the proportion equation
   619,423 : 978,992 = 978,992 : x
2. Step 2: Convert to fraction form
   619,423/978,992 = 978,992/x
3. Step 3: Cross multiply
   619,423x = 978,992 × 978,992
4. Step 4: Simplify right side
   619,423x = 958,425,336,064
5. Step 5: Solve for x
   x = 958,425,336,064/619,423
6. Step 6: Final answer
   x = 1,547,287.29