Finding the Third Proportional to 42,604 and 89,615

Step by Step Solution

1. Step 1: Write the proportion equation
   42,604 : 89,615 = 89,615 : x
2. Step 2: Convert to fraction form
   42,604/89,615 = 89,615/x
3. Step 3: Cross multiply
   42,604x = 89,615 × 89,615
4. Step 4: Simplify right side
   42,604x = 8,030,848,225
5. Step 5: Solve for x
   x = 8,030,848,225/42,604
6. Step 6: Final answer
   x = 188,499.86