Finding the Third Proportional to 407,154 and 804,089.25

Step by Step Solution

1. Step 1: Write the proportion equation
   407,154 : 804,089.25 = 804,089.25 : x
2. Step 2: Convert to fraction form
   407,154/804,089.25 = 804,089.25/x
3. Step 3: Cross multiply
   407,154x = 804,089.25 × 804,089.25
4. Step 4: Simplify right side
   407,154x = 646,559,521,965.56
5. Step 5: Solve for x
   x = 646,559,521,965.56/407,154
6. Step 6: Final answer
   x = 1,587,997.47