Finding the Third Proportional to 90,154 and 141,420

Step by Step Solution

1. Step 1: Write the proportion equation
   90,154 : 141,420 = 141,420 : x
2. Step 2: Convert to fraction form
   90,154/141,420 = 141,420/x
3. Step 3: Cross multiply
   90,154x = 141,420 × 141,420
4. Step 4: Simplify right side
   90,154x = 19,999,616,400
5. Step 5: Solve for x
   x = 19,999,616,400/90,154
6. Step 6: Final answer
   x = 221,838.37