Finding the Third Proportional to 19,818 and 41,280.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,818 : 41,280.75 = 41,280.75 : x
2. Step 2: Convert to fraction form
   19,818/41,280.75 = 41,280.75/x
3. Step 3: Cross multiply
   19,818x = 41,280.75 × 41,280.75
4. Step 4: Simplify right side
   19,818x = 1,704,100,320.56
5. Step 5: Solve for x
   x = 1,704,100,320.56/19,818
6. Step 6: Final answer
   x = 85,987.50