Finding the Third Proportional to 62,818 and 89,920

Step by Step Solution

1. Step 1: Write the proportion equation
   62,818 : 89,920 = 89,920 : x
2. Step 2: Convert to fraction form
   62,818/89,920 = 89,920/x
3. Step 3: Cross multiply
   62,818x = 89,920 × 89,920
4. Step 4: Simplify right side
   62,818x = 8,085,606,400
5. Step 5: Solve for x
   x = 8,085,606,400/62,818
6. Step 6: Final answer
   x = 128,714.80