Finding the Third Proportional to 58,699 and 89,171

Step by Step Solution

1. Step 1: Write the proportion equation
   58,699 : 89,171 = 89,171 : x
2. Step 2: Convert to fraction form
   58,699/89,171 = 89,171/x
3. Step 3: Cross multiply
   58,699x = 89,171 × 89,171
4. Step 4: Simplify right side
   58,699x = 7,951,467,241
5. Step 5: Solve for x
   x = 7,951,467,241/58,699
6. Step 6: Final answer
   x = 135,461.72