Finding the Third Proportional to 140,236 and 307,688

Step by Step Solution

1. Step 1: Write the proportion equation
   140,236 : 307,688 = 307,688 : x
2. Step 2: Convert to fraction form
   140,236/307,688 = 307,688/x
3. Step 3: Cross multiply
   140,236x = 307,688 × 307,688
4. Step 4: Simplify right side
   140,236x = 94,671,905,344
5. Step 5: Solve for x
   x = 94,671,905,344/140,236
6. Step 6: Final answer
   x = 675,089.89