Finding the Third Proportional to 90,418 and 141,131

Step by Step Solution

1. Step 1: Write the proportion equation
   90,418 : 141,131 = 141,131 : x
2. Step 2: Convert to fraction form
   90,418/141,131 = 141,131/x
3. Step 3: Cross multiply
   90,418x = 141,131 × 141,131
4. Step 4: Simplify right side
   90,418x = 19,917,959,161
5. Step 5: Solve for x
   x = 19,917,959,161/90,418
6. Step 6: Final answer
   x = 220,287.54