Finding the Third Proportional to 158,490 and 324,266.63

Step by Step Solution

1. Step 1: Write the proportion equation
   158,490 : 324,266.63 = 324,266.63 : x
2. Step 2: Convert to fraction form
   158,490/324,266.63 = 324,266.63/x
3. Step 3: Cross multiply
   158,490x = 324,266.63 × 324,266.63
4. Step 4: Simplify right side
   158,490x = 105,148,844,088.89
5. Step 5: Solve for x
   x = 105,148,844,088.89/158,490
6. Step 6: Final answer
   x = 663,441.50