Finding the Fourth Proportional to 679,619.50, 938,017.62 and 431,100.71

Step by Step Solution

1. Step 1: Write the proportion equation
   679,619.50 : 938,017.62 = 431,100.71 : x
2. Step 2: Convert to fraction form
   679,619.50/938,017.62 = 431,100.71/x
3. Step 3: Cross multiply
   679,619.50x = 938,017.62 × 431,100.71
4. Step 4: Simplify right side
   679,619.50x = 404,380,055,667.79
5. Step 5: Solve for x
   x = 404,380,055,667.79/679,619.50
6. Step 6: Final answer
   x = 595,009.49