Finding the Third Proportional to 408,090 and 573,665

Step by Step Solution

1. Step 1: Write the proportion equation
   408,090 : 573,665 = 573,665 : x
2. Step 2: Convert to fraction form
   408,090/573,665 = 573,665/x
3. Step 3: Cross multiply
   408,090x = 573,665 × 573,665
4. Step 4: Simplify right side
   408,090x = 329,091,532,225
5. Step 5: Solve for x
   x = 329,091,532,225/408,090
6. Step 6: Final answer
   x = 806,419.01