Finding the Third Proportional to 140,251.50 and 307,678.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,251.50 : 307,678.50 = 307,678.50 : x
2. Step 2: Convert to fraction form
   140,251.50/307,678.50 = 307,678.50/x
3. Step 3: Cross multiply
   140,251.50x = 307,678.50 × 307,678.50
4. Step 4: Simplify right side
   140,251.50x = 94,666,059,362.25
5. Step 5: Solve for x
   x = 94,666,059,362.25/140,251.50
6. Step 6: Final answer
   x = 674,973.60