Finding the Fourth Proportional to 613,300.82, 845,996.40 and 398,583.92

Step by Step Solution

1. Step 1: Write the proportion equation
   613,300.82 : 845,996.40 = 398,583.92 : x
2. Step 2: Convert to fraction form
   613,300.82/845,996.40 = 398,583.92/x
3. Step 3: Cross multiply
   613,300.82x = 845,996.40 × 398,583.92
4. Step 4: Simplify right side
   613,300.82x = 337,200,561,417.89
5. Step 5: Solve for x
   x = 337,200,561,417.89/613,300.82
6. Step 6: Final answer
   x = 549,812.67