Finding the Third Proportional to 140,818.50 and 307,759.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,818.50 : 307,759.50 = 307,759.50 : x
2. Step 2: Convert to fraction form
   140,818.50/307,759.50 = 307,759.50/x
3. Step 3: Cross multiply
   140,818.50x = 307,759.50 × 307,759.50
4. Step 4: Simplify right side
   140,818.50x = 94,715,909,840.25
5. Step 5: Solve for x
   x = 94,715,909,840.25/140,818.50
6. Step 6: Final answer
   x = 672,609.85