Finding the Third Proportional to 542,870 and 713,868

Step by Step Solution

1. Step 1: Write the proportion equation
   542,870 : 713,868 = 713,868 : x
2. Step 2: Convert to fraction form
   542,870/713,868 = 713,868/x
3. Step 3: Cross multiply
   542,870x = 713,868 × 713,868
4. Step 4: Simplify right side
   542,870x = 509,607,521,424
5. Step 5: Solve for x
   x = 509,607,521,424/542,870
6. Step 6: Final answer
   x = 938,728.46