Finding the Third Proportional to 245,635.50 and 390,597

Step by Step Solution

1. Step 1: Write the proportion equation
   245,635.50 : 390,597 = 390,597 : x
2. Step 2: Convert to fraction form
   245,635.50/390,597 = 390,597/x
3. Step 3: Cross multiply
   245,635.50x = 390,597 × 390,597
4. Step 4: Simplify right side
   245,635.50x = 152,566,016,409
5. Step 5: Solve for x
   x = 152,566,016,409/245,635.50
6. Step 6: Final answer
   x = 621,107.36