Finding the Third Proportional to 257,971.50 and 390,852

Step by Step Solution

1. Step 1: Write the proportion equation
   257,971.50 : 390,852 = 390,852 : x
2. Step 2: Convert to fraction form
   257,971.50/390,852 = 390,852/x
3. Step 3: Cross multiply
   257,971.50x = 390,852 × 390,852
4. Step 4: Simplify right side
   257,971.50x = 152,765,285,904
5. Step 5: Solve for x
   x = 152,765,285,904/257,971.50
6. Step 6: Final answer
   x = 592,178.93