Finding the Third Proportional to 56,128 and 131,144

Step by Step Solution

1. Step 1: Write the proportion equation
   56,128 : 131,144 = 131,144 : x
2. Step 2: Convert to fraction form
   56,128/131,144 = 131,144/x
3. Step 3: Cross multiply
   56,128x = 131,144 × 131,144
4. Step 4: Simplify right side
   56,128x = 17,198,748,736
5. Step 5: Solve for x
   x = 17,198,748,736/56,128
6. Step 6: Final answer
   x = 306,420.12