Finding the Third Proportional to 19,686.80 and 30,261.09

Step by Step Solution

1. Step 1: Write the proportion equation
   19,686.80 : 30,261.09 = 30,261.09 : x
2. Step 2: Convert to fraction form
   19,686.80/30,261.09 = 30,261.09/x
3. Step 3: Cross multiply
   19,686.80x = 30,261.09 × 30,261.09
4. Step 4: Simplify right side
   19,686.80x = 915,733,794.95
5. Step 5: Solve for x
   x = 915,733,794.95/19,686.80
6. Step 6: Final answer
   x = 46,515.12