Finding the Third Proportional to 313,429.50 and 470,139

Step by Step Solution

1. Step 1: Write the proportion equation
   313,429.50 : 470,139 = 470,139 : x
2. Step 2: Convert to fraction form
   313,429.50/470,139 = 470,139/x
3. Step 3: Cross multiply
   313,429.50x = 470,139 × 470,139
4. Step 4: Simplify right side
   313,429.50x = 221,030,679,321
5. Step 5: Solve for x
   x = 221,030,679,321/313,429.50
6. Step 6: Final answer
   x = 705,200.63