Finding the Third Proportional to 356,309 and 742,101.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,309 : 742,101.50 = 742,101.50 : x
2. Step 2: Convert to fraction form
   356,309/742,101.50 = 742,101.50/x
3. Step 3: Cross multiply
   356,309x = 742,101.50 × 742,101.50
4. Step 4: Simplify right side
   356,309x = 550,714,636,302.25
5. Step 5: Solve for x
   x = 550,714,636,302.25/356,309
6. Step 6: Final answer
   x = 1,545,609.67