Finding the Third Proportional to 66,615 and 141,858

Step by Step Solution

1. Step 1: Write the proportion equation
   66,615 : 141,858 = 141,858 : x
2. Step 2: Convert to fraction form
   66,615/141,858 = 141,858/x
3. Step 3: Cross multiply
   66,615x = 141,858 × 141,858
4. Step 4: Simplify right side
   66,615x = 20,123,692,164
5. Step 5: Solve for x
   x = 20,123,692,164/66,615
6. Step 6: Final answer
   x = 302,089.50