Finding the Third Proportional to 277,452 and 415,418.63

Step by Step Solution

1. Step 1: Write the proportion equation
   277,452 : 415,418.63 = 415,418.63 : x
2. Step 2: Convert to fraction form
   277,452/415,418.63 = 415,418.63/x
3. Step 3: Cross multiply
   277,452x = 415,418.63 × 415,418.63
4. Step 4: Simplify right side
   277,452x = 172,572,633,996.89
5. Step 5: Solve for x
   x = 172,572,633,996.89/277,452
6. Step 6: Final answer
   x = 621,990.95