Finding the Fourth Proportional to 538,726.43, 743,442.23 and 309,298.52

Step by Step Solution

1. Step 1: Write the proportion equation
   538,726.43 : 743,442.23 = 309,298.52 : x
2. Step 2: Convert to fraction form
   538,726.43/743,442.23 = 309,298.52/x
3. Step 3: Cross multiply
   538,726.43x = 743,442.23 × 309,298.52
4. Step 4: Simplify right side
   538,726.43x = 229,945,578,500.54
5. Step 5: Solve for x
   x = 229,945,578,500.54/538,726.43
6. Step 6: Final answer
   x = 426,831.81