Finding the Third Proportional to 140,480 and 307,240

Step by Step Solution

1. Step 1: Write the proportion equation
   140,480 : 307,240 = 307,240 : x
2. Step 2: Convert to fraction form
   140,480/307,240 = 307,240/x
3. Step 3: Cross multiply
   140,480x = 307,240 × 307,240
4. Step 4: Simplify right side
   140,480x = 94,396,417,600
5. Step 5: Solve for x
   x = 94,396,417,600/140,480
6. Step 6: Final answer
   x = 671,956.28