Finding the Third Proportional to 18,615 and 25,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,615 : 25,870.50 = 25,870.50 : x
2. Step 2: Convert to fraction form
   18,615/25,870.50 = 25,870.50/x
3. Step 3: Cross multiply
   18,615x = 25,870.50 × 25,870.50
4. Step 4: Simplify right side
   18,615x = 669,282,770.25
5. Step 5: Solve for x
   x = 669,282,770.25/18,615
6. Step 6: Final answer
   x = 35,953.95