Finding the Third Proportional to 78,289.50 and 104,870.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78,289.50 : 104,870.25 = 104,870.25 : x
2. Step 2: Convert to fraction form
   78,289.50/104,870.25 = 104,870.25/x
3. Step 3: Cross multiply
   78,289.50x = 104,870.25 × 104,870.25
4. Step 4: Simplify right side
   78,289.50x = 10,997,769,335.06
5. Step 5: Solve for x
   x = 10,997,769,335.06/78,289.50
6. Step 6: Final answer
   x = 140,475.66