Finding the Third Proportional to 216,159.50 and 345,320

Step by Step Solution

1. Step 1: Write the proportion equation
   216,159.50 : 345,320 = 345,320 : x
2. Step 2: Convert to fraction form
   216,159.50/345,320 = 345,320/x
3. Step 3: Cross multiply
   216,159.50x = 345,320 × 345,320
4. Step 4: Simplify right side
   216,159.50x = 119,245,902,400
5. Step 5: Solve for x
   x = 119,245,902,400/216,159.50
6. Step 6: Final answer
   x = 551,657.01