Finding the Third Proportional to 58,702 and 89,321

Step by Step Solution

1. Step 1: Write the proportion equation
   58,702 : 89,321 = 89,321 : x
2. Step 2: Convert to fraction form
   58,702/89,321 = 89,321/x
3. Step 3: Cross multiply
   58,702x = 89,321 × 89,321
4. Step 4: Simplify right side
   58,702x = 7,978,241,041
5. Step 5: Solve for x
   x = 7,978,241,041/58,702
6. Step 6: Final answer
   x = 135,910.89