Finding the Third Proportional to 88,308 and 208,310

Step by Step Solution

1. Step 1: Write the proportion equation
   88,308 : 208,310 = 208,310 : x
2. Step 2: Convert to fraction form
   88,308/208,310 = 208,310/x
3. Step 3: Cross multiply
   88,308x = 208,310 × 208,310
4. Step 4: Simplify right side
   88,308x = 43,393,056,100
5. Step 5: Solve for x
   x = 43,393,056,100/88,308
6. Step 6: Final answer
   x = 491,383.07