Finding the Fourth Proportional to 215,055.39, 322,539.78 and 204,385.59

Step by Step Solution

1. Step 1: Write the proportion equation
   215,055.39 : 322,539.78 = 204,385.59 : x
2. Step 2: Convert to fraction form
   215,055.39/322,539.78 = 204,385.59/x
3. Step 3: Cross multiply
   215,055.39x = 322,539.78 × 204,385.59
4. Step 4: Simplify right side
   215,055.39x = 65,922,483,233.77
5. Step 5: Solve for x
   x = 65,922,483,233.77/215,055.39
6. Step 6: Final answer
   x = 306,537.23