Finding the Third Proportional to 358,597 and 780,286.50

Step by Step Solution

1. Step 1: Write the proportion equation
   358,597 : 780,286.50 = 780,286.50 : x
2. Step 2: Convert to fraction form
   358,597/780,286.50 = 780,286.50/x
3. Step 3: Cross multiply
   358,597x = 780,286.50 × 780,286.50
4. Step 4: Simplify right side
   358,597x = 608,847,022,082.25
5. Step 5: Solve for x
   x = 608,847,022,082.25/358,597
6. Step 6: Final answer
   x = 1,697,858.66