Finding the Fourth Proportional to 1,297,284.89, 1,946,113.34 and 398,801.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,297,284.89 : 1,946,113.34 = 398,801.96 : x
2. Step 2: Convert to fraction form
   1,297,284.89/1,946,113.34 = 398,801.96/x
3. Step 3: Cross multiply
   1,297,284.89x = 1,946,113.34 × 398,801.96
4. Step 4: Simplify right side
   1,297,284.89x = 776,113,806,717.31
5. Step 5: Solve for x
   x = 776,113,806,717.31/1,297,284.89
6. Step 6: Final answer
   x = 598,260.12