Finding the Third Proportional to 220,777.50 and 349,770

Step by Step Solution

1. Step 1: Write the proportion equation
   220,777.50 : 349,770 = 349,770 : x
2. Step 2: Convert to fraction form
   220,777.50/349,770 = 349,770/x
3. Step 3: Cross multiply
   220,777.50x = 349,770 × 349,770
4. Step 4: Simplify right side
   220,777.50x = 122,339,052,900
5. Step 5: Solve for x
   x = 122,339,052,900/220,777.50
6. Step 6: Final answer
   x = 554,128.26