Finding the Fourth Proportional to 401,513.76, 603,019.48 and 353,499.39

Step by Step Solution

1. Step 1: Write the proportion equation
   401,513.76 : 603,019.48 = 353,499.39 : x
2. Step 2: Convert to fraction form
   401,513.76/603,019.48 = 353,499.39/x
3. Step 3: Cross multiply
   401,513.76x = 603,019.48 × 353,499.39
4. Step 4: Simplify right side
   401,513.76x = 213,167,018,338.12
5. Step 5: Solve for x
   x = 213,167,018,338.12/401,513.76
6. Step 6: Final answer
   x = 530,908.38