Finding the Fourth Proportional to 405,726.89, 559,892.99 and 224,448.89

Step by Step Solution

1. Step 1: Write the proportion equation
   405,726.89 : 559,892.99 = 224,448.89 : x
2. Step 2: Convert to fraction form
   405,726.89/559,892.99 = 224,448.89/x
3. Step 3: Cross multiply
   405,726.89x = 559,892.99 × 224,448.89
4. Step 4: Simplify right side
   405,726.89x = 125,667,357,885.94
5. Step 5: Solve for x
   x = 125,667,357,885.94/405,726.89
6. Step 6: Final answer
   x = 309,733.87