Finding the Third Proportional to 255,342 and 555,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   255,342 : 555,436.50 = 555,436.50 : x
2. Step 2: Convert to fraction form
   255,342/555,436.50 = 555,436.50/x
3. Step 3: Cross multiply
   255,342x = 555,436.50 × 555,436.50
4. Step 4: Simplify right side
   255,342x = 308,509,705,532.25
5. Step 5: Solve for x
   x = 308,509,705,532.25/255,342
6. Step 6: Final answer
   x = 1,208,221.54