Finding the Third Proportional to 158,938.50 and 330,810

Step by Step Solution

1. Step 1: Write the proportion equation
   158,938.50 : 330,810 = 330,810 : x
2. Step 2: Convert to fraction form
   158,938.50/330,810 = 330,810/x
3. Step 3: Cross multiply
   158,938.50x = 330,810 × 330,810
4. Step 4: Simplify right side
   158,938.50x = 109,435,256,100
5. Step 5: Solve for x
   x = 109,435,256,100/158,938.50
6. Step 6: Final answer
   x = 688,538.37