Finding the Third Proportional to 56,640 and 123,132

Step by Step Solution

1. Step 1: Write the proportion equation
   56,640 : 123,132 = 123,132 : x
2. Step 2: Convert to fraction form
   56,640/123,132 = 123,132/x
3. Step 3: Cross multiply
   56,640x = 123,132 × 123,132
4. Step 4: Simplify right side
   56,640x = 15,161,489,424
5. Step 5: Solve for x
   x = 15,161,489,424/56,640
6. Step 6: Final answer
   x = 267,681.66