Finding the Third Proportional to 149,850 and 318,768.75

Step by Step Solution

1. Step 1: Write the proportion equation
   149,850 : 318,768.75 = 318,768.75 : x
2. Step 2: Convert to fraction form
   149,850/318,768.75 = 318,768.75/x
3. Step 3: Cross multiply
   149,850x = 318,768.75 × 318,768.75
4. Step 4: Simplify right side
   149,850x = 101,613,515,976.56
5. Step 5: Solve for x
   x = 101,613,515,976.56/149,850
6. Step 6: Final answer
   x = 678,101.54