Finding the Third Proportional to 56,677.50 and 124,128

Step by Step Solution

1. Step 1: Write the proportion equation
   56,677.50 : 124,128 = 124,128 : x
2. Step 2: Convert to fraction form
   56,677.50/124,128 = 124,128/x
3. Step 3: Cross multiply
   56,677.50x = 124,128 × 124,128
4. Step 4: Simplify right side
   56,677.50x = 15,407,760,384
5. Step 5: Solve for x
   x = 15,407,760,384/56,677.50
6. Step 6: Final answer
   x = 271,849.68