Finding the Third Proportional to 89,320 and 121,300

Step by Step Solution

1. Step 1: Write the proportion equation
   89,320 : 121,300 = 121,300 : x
2. Step 2: Convert to fraction form
   89,320/121,300 = 121,300/x
3. Step 3: Cross multiply
   89,320x = 121,300 × 121,300
4. Step 4: Simplify right side
   89,320x = 14,713,690,000
5. Step 5: Solve for x
   x = 14,713,690,000/89,320
6. Step 6: Final answer
   x = 164,730.07