Finding the Third Proportional to 140,312.25 and 307,789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,312.25 : 307,789.50 = 307,789.50 : x
2. Step 2: Convert to fraction form
   140,312.25/307,789.50 = 307,789.50/x
3. Step 3: Cross multiply
   140,312.25x = 307,789.50 × 307,789.50
4. Step 4: Simplify right side
   140,312.25x = 94,734,376,310.25
5. Step 5: Solve for x
   x = 94,734,376,310.25/140,312.25
6. Step 6: Final answer
   x = 675,168.25