Finding the Third Proportional to 90,300 and 197,256

Step by Step Solution

1. Step 1: Write the proportion equation
   90,300 : 197,256 = 197,256 : x
2. Step 2: Convert to fraction form
   90,300/197,256 = 197,256/x
3. Step 3: Cross multiply
   90,300x = 197,256 × 197,256
4. Step 4: Simplify right side
   90,300x = 38,909,929,536
5. Step 5: Solve for x
   x = 38,909,929,536/90,300
6. Step 6: Final answer
   x = 430,896.23