Finding the Third Proportional to 210,420.56 and 326,485.69

Step by Step Solution

1. Step 1: Write the proportion equation
   210,420.56 : 326,485.69 = 326,485.69 : x
2. Step 2: Convert to fraction form
   210,420.56/326,485.69 = 326,485.69/x
3. Step 3: Cross multiply
   210,420.56x = 326,485.69 × 326,485.69
4. Step 4: Simplify right side
   210,420.56x = 106,592,904,142.35
5. Step 5: Solve for x
   x = 106,592,904,142.35/210,420.56
6. Step 6: Final answer
   x = 506,570.76