Finding the Third Proportional to 18,619.88 and 40,515.75

Step by Step Solution

1. Step 1: Write the proportion equation
   18,619.88 : 40,515.75 = 40,515.75 : x
2. Step 2: Convert to fraction form
   18,619.88/40,515.75 = 40,515.75/x
3. Step 3: Cross multiply
   18,619.88x = 40,515.75 × 40,515.75
4. Step 4: Simplify right side
   18,619.88x = 1,641,525,998.06
5. Step 5: Solve for x
   x = 1,641,525,998.06/18,619.88
6. Step 6: Final answer
   x = 88,159.88