Finding the Third Proportional to 35,278.50 and 54,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   35,278.50 : 54,685.50 = 54,685.50 : x
2. Step 2: Convert to fraction form
   35,278.50/54,685.50 = 54,685.50/x
3. Step 3: Cross multiply
   35,278.50x = 54,685.50 × 54,685.50
4. Step 4: Simplify right side
   35,278.50x = 2,990,503,910.25
5. Step 5: Solve for x
   x = 2,990,503,910.25/35,278.50
6. Step 6: Final answer
   x = 84,768.45