Finding the Third Proportional to 86,420 and 141,116

Step by Step Solution

1. Step 1: Write the proportion equation
   86,420 : 141,116 = 141,116 : x
2. Step 2: Convert to fraction form
   86,420/141,116 = 141,116/x
3. Step 3: Cross multiply
   86,420x = 141,116 × 141,116
4. Step 4: Simplify right side
   86,420x = 19,913,725,456
5. Step 5: Solve for x
   x = 19,913,725,456/86,420
6. Step 6: Final answer
   x = 230,429.59