Finding the Third Proportional to 208,580 and 455,404

Step by Step Solution

1. Step 1: Write the proportion equation
   208,580 : 455,404 = 455,404 : x
2. Step 2: Convert to fraction form
   208,580/455,404 = 455,404/x
3. Step 3: Cross multiply
   208,580x = 455,404 × 455,404
4. Step 4: Simplify right side
   208,580x = 207,392,803,216
5. Step 5: Solve for x
   x = 207,392,803,216/208,580
6. Step 6: Final answer
   x = 994,308.19