Finding the Third Proportional to 264,820.50 and 405,180

Step by Step Solution

1. Step 1: Write the proportion equation
   264,820.50 : 405,180 = 405,180 : x
2. Step 2: Convert to fraction form
   264,820.50/405,180 = 405,180/x
3. Step 3: Cross multiply
   264,820.50x = 405,180 × 405,180
4. Step 4: Simplify right side
   264,820.50x = 164,170,832,400
5. Step 5: Solve for x
   x = 164,170,832,400/264,820.50
6. Step 6: Final answer
   x = 619,932.49