Finding the Third Proportional to 163,809.50 and 350,390

Step by Step Solution

1. Step 1: Write the proportion equation
   163,809.50 : 350,390 = 350,390 : x
2. Step 2: Convert to fraction form
   163,809.50/350,390 = 350,390/x
3. Step 3: Cross multiply
   163,809.50x = 350,390 × 350,390
4. Step 4: Simplify right side
   163,809.50x = 122,773,152,100
5. Step 5: Solve for x
   x = 122,773,152,100/163,809.50
6. Step 6: Final answer
   x = 749,487.37