Finding the Fourth Proportional to 479,387.99, 661,019.00 and 391,900.03

Step by Step Solution

1. Step 1: Write the proportion equation
   479,387.99 : 661,019.00 = 391,900.03 : x
2. Step 2: Convert to fraction form
   479,387.99/661,019.00 = 391,900.03/x
3. Step 3: Cross multiply
   479,387.99x = 661,019.00 × 391,900.03
4. Step 4: Simplify right side
   479,387.99x = 259,053,365,287.22
5. Step 5: Solve for x
   x = 259,053,365,287.22/479,387.99
6. Step 6: Final answer
   x = 540,383.51