Finding the Third Proportional to 86,068 and 120,990

Step by Step Solution

1. Step 1: Write the proportion equation
   86,068 : 120,990 = 120,990 : x
2. Step 2: Convert to fraction form
   86,068/120,990 = 120,990/x
3. Step 3: Cross multiply
   86,068x = 120,990 × 120,990
4. Step 4: Simplify right side
   86,068x = 14,638,580,100
5. Step 5: Solve for x
   x = 14,638,580,100/86,068
6. Step 6: Final answer
   x = 170,081.56