Finding the Fourth Proportional to 498,978.09, 688,590.05 and 269,535.38

Step by Step Solution

1. Step 1: Write the proportion equation
   498,978.09 : 688,590.05 = 269,535.38 : x
2. Step 2: Convert to fraction form
   498,978.09/688,590.05 = 269,535.38/x
3. Step 3: Cross multiply
   498,978.09x = 688,590.05 × 269,535.38
4. Step 4: Simplify right side
   498,978.09x = 185,599,379,743.33
5. Step 5: Solve for x
   x = 185,599,379,743.33/498,978.09
6. Step 6: Final answer
   x = 371,958.97