Finding the Third Proportional to 19,990.55 and 30,515.48

Step by Step Solution

1. Step 1: Write the proportion equation
   19,990.55 : 30,515.48 = 30,515.48 : x
2. Step 2: Convert to fraction form
   19,990.55/30,515.48 = 30,515.48/x
3. Step 3: Cross multiply
   19,990.55x = 30,515.48 × 30,515.48
4. Step 4: Simplify right side
   19,990.55x = 931,194,786.64
5. Step 5: Solve for x
   x = 931,194,786.64/19,990.55
6. Step 6: Final answer
   x = 46,581.76