Finding the Third Proportional to 90,722 and 208,229

Step by Step Solution

1. Step 1: Write the proportion equation
   90,722 : 208,229 = 208,229 : x
2. Step 2: Convert to fraction form
   90,722/208,229 = 208,229/x
3. Step 3: Cross multiply
   90,722x = 208,229 × 208,229
4. Step 4: Simplify right side
   90,722x = 43,359,316,441
5. Step 5: Solve for x
   x = 43,359,316,441/90,722
6. Step 6: Final answer
   x = 477,936.07