Finding the Third Proportional to 275,985 and 411,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   275,985 : 411,061.50 = 411,061.50 : x
2. Step 2: Convert to fraction form
   275,985/411,061.50 = 411,061.50/x
3. Step 3: Cross multiply
   275,985x = 411,061.50 × 411,061.50
4. Step 4: Simplify right side
   275,985x = 168,971,556,782.25
5. Step 5: Solve for x
   x = 168,971,556,782.25/275,985
6. Step 6: Final answer
   x = 612,249.06