Finding the Fourth Proportional to 419,659.31, 579,111.71 and 238,370.69

Step by Step Solution

1. Step 1: Write the proportion equation
   419,659.31 : 579,111.71 = 238,370.69 : x
2. Step 2: Convert to fraction form
   419,659.31/579,111.71 = 238,370.69/x
3. Step 3: Cross multiply
   419,659.31x = 579,111.71 × 238,370.69
4. Step 4: Simplify right side
   419,659.31x = 138,043,253,812.37
5. Step 5: Solve for x
   x = 138,043,253,812.37/419,659.31
6. Step 6: Final answer
   x = 328,941.24