Finding the Third Proportional to 188,239.50 and 282,780

Step by Step Solution

1. Step 1: Write the proportion equation
   188,239.50 : 282,780 = 282,780 : x
2. Step 2: Convert to fraction form
   188,239.50/282,780 = 282,780/x
3. Step 3: Cross multiply
   188,239.50x = 282,780 × 282,780
4. Step 4: Simplify right side
   188,239.50x = 79,964,528,400
5. Step 5: Solve for x
   x = 79,964,528,400/188,239.50
6. Step 6: Final answer
   x = 424,802.07