Finding the Fourth Proportional to 434,086.43, 650,991.71 and 405,750.33

Step by Step Solution

1. Step 1: Write the proportion equation
   434,086.43 : 650,991.71 = 405,750.33 : x
2. Step 2: Convert to fraction form
   434,086.43/650,991.71 = 405,750.33/x
3. Step 3: Cross multiply
   434,086.43x = 650,991.71 × 405,750.33
4. Step 4: Simplify right side
   434,086.43x = 264,140,099,131.01
5. Step 5: Solve for x
   x = 264,140,099,131.01/434,086.43
6. Step 6: Final answer
   x = 608,496.56