Finding the Third Proportional to 142,853 and 307,204.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,853 : 307,204.50 = 307,204.50 : x
2. Step 2: Convert to fraction form
   142,853/307,204.50 = 307,204.50/x
3. Step 3: Cross multiply
   142,853x = 307,204.50 × 307,204.50
4. Step 4: Simplify right side
   142,853x = 94,374,604,820.25
5. Step 5: Solve for x
   x = 94,374,604,820.25/142,853
6. Step 6: Final answer
   x = 660,641.39