Finding the Fourth Proportional to 402,085.39, 554,922.15 and 230,019.22

Step by Step Solution

1. Step 1: Write the proportion equation
   402,085.39 : 554,922.15 = 230,019.22 : x
2. Step 2: Convert to fraction form
   402,085.39/554,922.15 = 230,019.22/x
3. Step 3: Cross multiply
   402,085.39x = 554,922.15 × 230,019.22
4. Step 4: Simplify right side
   402,085.39x = 127,642,760,103.72
5. Step 5: Solve for x
   x = 127,642,760,103.72/402,085.39
6. Step 6: Final answer
   x = 317,451.87