Finding the Fourth Proportional to 450,155.31, 621,145.33 and 259,131.79

Step by Step Solution

1. Step 1: Write the proportion equation
   450,155.31 : 621,145.33 = 259,131.79 : x
2. Step 2: Convert to fraction form
   450,155.31/621,145.33 = 259,131.79/x
3. Step 3: Cross multiply
   450,155.31x = 621,145.33 × 259,131.79
4. Step 4: Simplify right side
   450,155.31x = 160,958,501,213.04
5. Step 5: Solve for x
   x = 160,958,501,213.04/450,155.31
6. Step 6: Final answer
   x = 357,562.15