Finding the Fourth Proportional to 679,622.47, 938,021.72 and 431,103.67

Step by Step Solution

1. Step 1: Write the proportion equation
   679,622.47 : 938,021.72 = 431,103.67 : x
2. Step 2: Convert to fraction form
   679,622.47/938,021.72 = 431,103.67/x
3. Step 3: Cross multiply
   679,622.47x = 938,021.72 × 431,103.67
4. Step 4: Simplify right side
   679,622.47x = 404,384,606,031.71
5. Step 5: Solve for x
   x = 404,384,606,031.71/679,622.47
6. Step 6: Final answer
   x = 595,013.59