Finding the Third Proportional to 90,416 and 141,128

Step by Step Solution

1. Step 1: Write the proportion equation
   90,416 : 141,128 = 141,128 : x
2. Step 2: Convert to fraction form
   90,416/141,128 = 141,128/x
3. Step 3: Cross multiply
   90,416x = 141,128 × 141,128
4. Step 4: Simplify right side
   90,416x = 19,917,112,384
5. Step 5: Solve for x
   x = 19,917,112,384/90,416
6. Step 6: Final answer
   x = 220,283.05