Finding the Third Proportional to 142,803 and 311,850

Step by Step Solution

1. Step 1: Write the proportion equation
   142,803 : 311,850 = 311,850 : x
2. Step 2: Convert to fraction form
   142,803/311,850 = 311,850/x
3. Step 3: Cross multiply
   142,803x = 311,850 × 311,850
4. Step 4: Simplify right side
   142,803x = 97,250,422,500
5. Step 5: Solve for x
   x = 97,250,422,500/142,803
6. Step 6: Final answer
   x = 681,011.06