Finding the Fourth Proportional to 679,620.72, 938,019.30 and 431,101.92

Step by Step Solution

1. Step 1: Write the proportion equation
   679,620.72 : 938,019.30 = 431,101.92 : x
2. Step 2: Convert to fraction form
   679,620.72/938,019.30 = 431,101.92/x
3. Step 3: Cross multiply
   679,620.72x = 938,019.30 × 431,101.92
4. Step 4: Simplify right side
   679,620.72x = 404,381,922,914.77
5. Step 5: Solve for x
   x = 404,381,922,914.77/679,620.72
6. Step 6: Final answer
   x = 595,011.17