Finding the Third Proportional to 89,128 and 190,284

Step by Step Solution

1. Step 1: Write the proportion equation
   89,128 : 190,284 = 190,284 : x
2. Step 2: Convert to fraction form
   89,128/190,284 = 190,284/x
3. Step 3: Cross multiply
   89,128x = 190,284 × 190,284
4. Step 4: Simplify right side
   89,128x = 36,208,000,656
5. Step 5: Solve for x
   x = 36,208,000,656/89,128
6. Step 6: Final answer
   x = 406,247.20