Finding the Third Proportional to 141,440 and 308,128

Step by Step Solution

1. Step 1: Write the proportion equation
   141,440 : 308,128 = 308,128 : x
2. Step 2: Convert to fraction form
   141,440/308,128 = 308,128/x
3. Step 3: Cross multiply
   141,440x = 308,128 × 308,128
4. Step 4: Simplify right side
   141,440x = 94,942,864,384
5. Step 5: Solve for x
   x = 94,942,864,384/141,440
6. Step 6: Final answer
   x = 671,258.94