Finding the Fourth Proportional to 753,613.31, 1,039,413.78 and 521,426.81

Step by Step Solution

1. Step 1: Write the proportion equation
   753,613.31 : 1,039,413.78 = 521,426.81 : x
2. Step 2: Convert to fraction form
   753,613.31/1,039,413.78 = 521,426.81/x
3. Step 3: Cross multiply
   753,613.31x = 1,039,413.78 × 521,426.81
4. Step 4: Simplify right side
   753,613.31x = 541,978,206,378.37
5. Step 5: Solve for x
   x = 541,978,206,378.37/753,613.31
6. Step 6: Final answer
   x = 719,172.82