Finding the Third Proportional to 90,888 and 190,128

Step by Step Solution

1. Step 1: Write the proportion equation
   90,888 : 190,128 = 190,128 : x
2. Step 2: Convert to fraction form
   90,888/190,128 = 190,128/x
3. Step 3: Cross multiply
   90,888x = 190,128 × 190,128
4. Step 4: Simplify right side
   90,888x = 36,148,656,384
5. Step 5: Solve for x
   x = 36,148,656,384/90,888
6. Step 6: Final answer
   x = 397,727.49