Finding the Fourth Proportional to 272,453.34, 408,799.89 and 139,443.24

Step by Step Solution

1. Step 1: Write the proportion equation
   272,453.34 : 408,799.89 = 139,443.24 : x
2. Step 2: Convert to fraction form
   272,453.34/408,799.89 = 139,443.24/x
3. Step 3: Cross multiply
   272,453.34x = 408,799.89 × 139,443.24
4. Step 4: Simplify right side
   272,453.34x = 57,004,381,173.24
5. Step 5: Solve for x
   x = 57,004,381,173.24/272,453.34
6. Step 6: Final answer
   x = 209,226.22