Finding the Third Proportional to 312,087 and 470,938.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,087 : 470,938.50 = 470,938.50 : x
2. Step 2: Convert to fraction form
   312,087/470,938.50 = 470,938.50/x
3. Step 3: Cross multiply
   312,087x = 470,938.50 × 470,938.50
4. Step 4: Simplify right side
   312,087x = 221,783,070,782.25
5. Step 5: Solve for x
   x = 221,783,070,782.25/312,087
6. Step 6: Final answer
   x = 710,645.01