Finding the Third Proportional to 342,680 and 742,564

Step by Step Solution

1. Step 1: Write the proportion equation
   342,680 : 742,564 = 742,564 : x
2. Step 2: Convert to fraction form
   342,680/742,564 = 742,564/x
3. Step 3: Cross multiply
   342,680x = 742,564 × 742,564
4. Step 4: Simplify right side
   342,680x = 551,401,294,096
5. Step 5: Solve for x
   x = 551,401,294,096/342,680
6. Step 6: Final answer
   x = 1,609,085.14