Finding the Third Proportional to 87,144 and 190,902

Step by Step Solution

1. Step 1: Write the proportion equation
   87,144 : 190,902 = 190,902 : x
2. Step 2: Convert to fraction form
   87,144/190,902 = 190,902/x
3. Step 3: Cross multiply
   87,144x = 190,902 × 190,902
4. Step 4: Simplify right side
   87,144x = 36,443,573,604
5. Step 5: Solve for x
   x = 36,443,573,604/87,144
6. Step 6: Final answer
   x = 418,199.46