Finding the Third Proportional to 251,934 and 390,072.75

Step by Step Solution

1. Step 1: Write the proportion equation
   251,934 : 390,072.75 = 390,072.75 : x
2. Step 2: Convert to fraction form
   251,934/390,072.75 = 390,072.75/x
3. Step 3: Cross multiply
   251,934x = 390,072.75 × 390,072.75
4. Step 4: Simplify right side
   251,934x = 152,156,750,292.56
5. Step 5: Solve for x
   x = 152,156,750,292.56/251,934
6. Step 6: Final answer
   x = 603,954.81