Finding the Third Proportional to 312,042 and 470,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,042 : 470,818.50 = 470,818.50 : x
2. Step 2: Convert to fraction form
   312,042/470,818.50 = 470,818.50/x
3. Step 3: Cross multiply
   312,042x = 470,818.50 × 470,818.50
4. Step 4: Simplify right side
   312,042x = 221,670,059,942.25
5. Step 5: Solve for x
   x = 221,670,059,942.25/312,042
6. Step 6: Final answer
   x = 710,385.33