Finding the Fourth Proportional to 723,441.53, 998,300.64 and 401,139.69

Step by Step Solution

1. Step 1: Write the proportion equation
   723,441.53 : 998,300.64 = 401,139.69 : x
2. Step 2: Convert to fraction form
   723,441.53/998,300.64 = 401,139.69/x
3. Step 3: Cross multiply
   723,441.53x = 998,300.64 × 401,139.69
4. Step 4: Simplify right side
   723,441.53x = 400,458,009,256.40
5. Step 5: Solve for x
   x = 400,458,009,256.40/723,441.53
6. Step 6: Final answer
   x = 553,545.79