Finding the Third Proportional to 305,131.31 and 664,507.88

Step by Step Solution

1. Step 1: Write the proportion equation
   305,131.31 : 664,507.88 = 664,507.88 : x
2. Step 2: Convert to fraction form
   305,131.31/664,507.88 = 664,507.88/x
3. Step 3: Cross multiply
   305,131.31x = 664,507.88 × 664,507.88
4. Step 4: Simplify right side
   305,131.31x = 441,570,715,937.02
5. Step 5: Solve for x
   x = 441,570,715,937.02/305,131.31
6. Step 6: Final answer
   x = 1,447,149.79