Finding the Third Proportional to 277,497 and 415,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   277,497 : 415,128.50 = 415,128.50 : x
2. Step 2: Convert to fraction form
   277,497/415,128.50 = 415,128.50/x
3. Step 3: Cross multiply
   277,497x = 415,128.50 × 415,128.50
4. Step 4: Simplify right side
   277,497x = 172,331,671,512.25
5. Step 5: Solve for x
   x = 172,331,671,512.25/277,497
6. Step 6: Final answer
   x = 621,021.75