Finding the Third Proportional to 251,922 and 390,052.50

Step by Step Solution

1. Step 1: Write the proportion equation
   251,922 : 390,052.50 = 390,052.50 : x
2. Step 2: Convert to fraction form
   251,922/390,052.50 = 390,052.50/x
3. Step 3: Cross multiply
   251,922x = 390,052.50 × 390,052.50
4. Step 4: Simplify right side
   251,922x = 152,140,952,756.25
5. Step 5: Solve for x
   x = 152,140,952,756.25/251,922
6. Step 6: Final answer
   x = 603,920.87