Finding the Fourth Proportional to 681,556.72, 940,708.62 and 423,628.50

Step by Step Solution

1. Step 1: Write the proportion equation
   681,556.72 : 940,708.62 = 423,628.50 : x
2. Step 2: Convert to fraction form
   681,556.72/940,708.62 = 423,628.50/x
3. Step 3: Cross multiply
   681,556.72x = 940,708.62 × 423,628.50
4. Step 4: Simplify right side
   681,556.72x = 398,510,981,627.67
5. Step 5: Solve for x
   x = 398,510,981,627.67/681,556.72
6. Step 6: Final answer
   x = 584,706.99