Finding the Third Proportional to 78,480 and 104,436

Step by Step Solution

1. Step 1: Write the proportion equation
   78,480 : 104,436 = 104,436 : x
2. Step 2: Convert to fraction form
   78,480/104,436 = 104,436/x
3. Step 3: Cross multiply
   78,480x = 104,436 × 104,436
4. Step 4: Simplify right side
   78,480x = 10,906,878,096
5. Step 5: Solve for x
   x = 10,906,878,096/78,480
6. Step 6: Final answer
   x = 138,976.53