Finding the Third Proportional to 251,949.23 and 390,155.48

Step by Step Solution

1. Step 1: Write the proportion equation
   251,949.23 : 390,155.48 = 390,155.48 : x
2. Step 2: Convert to fraction form
   251,949.23/390,155.48 = 390,155.48/x
3. Step 3: Cross multiply
   251,949.23x = 390,155.48 × 390,155.48
4. Step 4: Simplify right side
   251,949.23x = 152,221,301,987.89
5. Step 5: Solve for x
   x = 152,221,301,987.89/251,949.23
6. Step 6: Final answer
   x = 604,174.50