Finding the Third Proportional to 170,325 and 257,845.50

Step by Step Solution

1. Step 1: Write the proportion equation
   170,325 : 257,845.50 = 257,845.50 : x
2. Step 2: Convert to fraction form
   170,325/257,845.50 = 257,845.50/x
3. Step 3: Cross multiply
   170,325x = 257,845.50 × 257,845.50
4. Step 4: Simplify right side
   170,325x = 66,484,301,870.25
5. Step 5: Solve for x
   x = 66,484,301,870.25/170,325
6. Step 6: Final answer
   x = 390,337.89