Finding the Third Proportional to 58,018 and 86,810

Step by Step Solution

1. Step 1: Write the proportion equation
   58,018 : 86,810 = 86,810 : x
2. Step 2: Convert to fraction form
   58,018/86,810 = 86,810/x
3. Step 3: Cross multiply
   58,018x = 86,810 × 86,810
4. Step 4: Simplify right side
   58,018x = 7,535,976,100
5. Step 5: Solve for x
   x = 7,535,976,100/58,018
6. Step 6: Final answer
   x = 129,890.31