Finding the Fourth Proportional to 724,123.82, 999,275.72 and 401,831.30

Step by Step Solution

1. Step 1: Write the proportion equation
   724,123.82 : 999,275.72 = 401,831.30 : x
2. Step 2: Convert to fraction form
   724,123.82/999,275.72 = 401,831.30/x
3. Step 3: Cross multiply
   724,123.82x = 999,275.72 × 401,831.30
4. Step 4: Simplify right side
   724,123.82x = 401,540,261,626.04
5. Step 5: Solve for x
   x = 401,540,261,626.04/724,123.82
6. Step 6: Final answer
   x = 554,518.79