Finding the Fourth Proportional to 274,470.72, 411,495.02 and 139,423.82

Step by Step Solution

1. Step 1: Write the proportion equation
   274,470.72 : 411,495.02 = 139,423.82 : x
2. Step 2: Convert to fraction form
   274,470.72/411,495.02 = 139,423.82/x
3. Step 3: Cross multiply
   274,470.72x = 411,495.02 × 139,423.82
4. Step 4: Simplify right side
   274,470.72x = 57,372,204,844.78
5. Step 5: Solve for x
   x = 57,372,204,844.78/274,470.72
6. Step 6: Final answer
   x = 209,028.51