Finding the Third Proportional to 19,857 and 30,718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,857 : 30,718.50 = 30,718.50 : x
2. Step 2: Convert to fraction form
   19,857/30,718.50 = 30,718.50/x
3. Step 3: Cross multiply
   19,857x = 30,718.50 × 30,718.50
4. Step 4: Simplify right side
   19,857x = 943,626,242.25
5. Step 5: Solve for x
   x = 943,626,242.25/19,857
6. Step 6: Final answer
   x = 47,521.09