Finding the Third Proportional to 359,208 and 538,815

Step by Step Solution

1. Step 1: Write the proportion equation
   359,208 : 538,815 = 538,815 : x
2. Step 2: Convert to fraction form
   359,208/538,815 = 538,815/x
3. Step 3: Cross multiply
   359,208x = 538,815 × 538,815
4. Step 4: Simplify right side
   359,208x = 290,321,604,225
5. Step 5: Solve for x
   x = 290,321,604,225/359,208
6. Step 6: Final answer
   x = 808,227.00