Finding the Fourth Proportional to 383,068.38, 528,086.55 and 269,538.78

Step by Step Solution

1. Step 1: Write the proportion equation
   383,068.38 : 528,086.55 = 269,538.78 : x
2. Step 2: Convert to fraction form
   383,068.38/528,086.55 = 269,538.78/x
3. Step 3: Cross multiply
   383,068.38x = 528,086.55 × 269,538.78
4. Step 4: Simplify right side
   383,068.38x = 142,339,804,421.41
5. Step 5: Solve for x
   x = 142,339,804,421.41/383,068.38
6. Step 6: Final answer
   x = 371,578.06