Finding the Third Proportional to 305,451 and 436,321.69

Step by Step Solution

1. Step 1: Write the proportion equation
   305,451 : 436,321.69 = 436,321.69 : x
2. Step 2: Convert to fraction form
   305,451/436,321.69 = 436,321.69/x
3. Step 3: Cross multiply
   305,451x = 436,321.69 × 436,321.69
4. Step 4: Simplify right side
   305,451x = 190,376,614,982.85
5. Step 5: Solve for x
   x = 190,376,614,982.85/305,451
6. Step 6: Final answer
   x = 623,264.01