Finding the Third Proportional to 342,786 and 742,777.50

Step by Step Solution

1. Step 1: Write the proportion equation
   342,786 : 742,777.50 = 742,777.50 : x
2. Step 2: Convert to fraction form
   342,786/742,777.50 = 742,777.50/x
3. Step 3: Cross multiply
   342,786x = 742,777.50 × 742,777.50
4. Step 4: Simplify right side
   342,786x = 551,718,414,506.25
5. Step 5: Solve for x
   x = 551,718,414,506.25/342,786
6. Step 6: Final answer
   x = 1,609,512.68