Finding the Third Proportional to 155,536.50 and 322,143

Step by Step Solution

1. Step 1: Write the proportion equation
   155,536.50 : 322,143 = 322,143 : x
2. Step 2: Convert to fraction form
   155,536.50/322,143 = 322,143/x
3. Step 3: Cross multiply
   155,536.50x = 322,143 × 322,143
4. Step 4: Simplify right side
   155,536.50x = 103,776,112,449
5. Step 5: Solve for x
   x = 103,776,112,449/155,536.50
6. Step 6: Final answer
   x = 667,213.89