Finding the Third Proportional to 356,328 and 742,147.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,328 : 742,147.50 = 742,147.50 : x
2. Step 2: Convert to fraction form
   356,328/742,147.50 = 742,147.50/x
3. Step 3: Cross multiply
   356,328x = 742,147.50 × 742,147.50
4. Step 4: Simplify right side
   356,328x = 550,782,911,756.25
5. Step 5: Solve for x
   x = 550,782,911,756.25/356,328
6. Step 6: Final answer
   x = 1,545,718.87