Finding the Third Proportional to 62,780 and 89,486

Step by Step Solution

1. Step 1: Write the proportion equation
   62,780 : 89,486 = 89,486 : x
2. Step 2: Convert to fraction form
   62,780/89,486 = 89,486/x
3. Step 3: Cross multiply
   62,780x = 89,486 × 89,486
4. Step 4: Simplify right side
   62,780x = 8,007,744,196
5. Step 5: Solve for x
   x = 8,007,744,196/62,780
6. Step 6: Final answer
   x = 127,552.47