Finding the Third Proportional to 301,818 and 447,547.50

Step by Step Solution

1. Step 1: Write the proportion equation
   301,818 : 447,547.50 = 447,547.50 : x
2. Step 2: Convert to fraction form
   301,818/447,547.50 = 447,547.50/x
3. Step 3: Cross multiply
   301,818x = 447,547.50 × 447,547.50
4. Step 4: Simplify right side
   301,818x = 200,298,764,756.25
5. Step 5: Solve for x
   x = 200,298,764,756.25/301,818
6. Step 6: Final answer
   x = 663,640.89