Finding the Third Proportional to 86,390 and 141,068

Step by Step Solution

1. Step 1: Write the proportion equation
   86,390 : 141,068 = 141,068 : x
2. Step 2: Convert to fraction form
   86,390/141,068 = 141,068/x
3. Step 3: Cross multiply
   86,390x = 141,068 × 141,068
4. Step 4: Simplify right side
   86,390x = 19,900,180,624
5. Step 5: Solve for x
   x = 19,900,180,624/86,390
6. Step 6: Final answer
   x = 230,352.83