Finding the Third Proportional to 56,784 and 123,480

Step by Step Solution

1. Step 1: Write the proportion equation
   56,784 : 123,480 = 123,480 : x
2. Step 2: Convert to fraction form
   56,784/123,480 = 123,480/x
3. Step 3: Cross multiply
   56,784x = 123,480 × 123,480
4. Step 4: Simplify right side
   56,784x = 15,247,310,400
5. Step 5: Solve for x
   x = 15,247,310,400/56,784
6. Step 6: Final answer
   x = 268,514.20