Finding the Third Proportional to 78,278 and 104,860

Step by Step Solution

1. Step 1: Write the proportion equation
   78,278 : 104,860 = 104,860 : x
2. Step 2: Convert to fraction form
   78,278/104,860 = 104,860/x
3. Step 3: Cross multiply
   78,278x = 104,860 × 104,860
4. Step 4: Simplify right side
   78,278x = 10,995,619,600
5. Step 5: Solve for x
   x = 10,995,619,600/78,278
6. Step 6: Final answer
   x = 140,468.84