Finding the Third Proportional to 302,812 and 657,138.50

Step by Step Solution

1. Step 1: Write the proportion equation
   302,812 : 657,138.50 = 657,138.50 : x
2. Step 2: Convert to fraction form
   302,812/657,138.50 = 657,138.50/x
3. Step 3: Cross multiply
   302,812x = 657,138.50 × 657,138.50
4. Step 4: Simplify right side
   302,812x = 431,831,008,182.25
5. Step 5: Solve for x
   x = 431,831,008,182.25/302,812
6. Step 6: Final answer
   x = 1,426,069.67