Finding the Third Proportional to 56,138 and 123,576

Step by Step Solution

1. Step 1: Write the proportion equation
   56,138 : 123,576 = 123,576 : x
2. Step 2: Convert to fraction form
   56,138/123,576 = 123,576/x
3. Step 3: Cross multiply
   56,138x = 123,576 × 123,576
4. Step 4: Simplify right side
   56,138x = 15,271,027,776
5. Step 5: Solve for x
   x = 15,271,027,776/56,138
6. Step 6: Final answer
   x = 272,026.57