Finding the Fourth Proportional to 485,969.88, 670,638.72 and 271,109.94

Step by Step Solution

1. Step 1: Write the proportion equation
   485,969.88 : 670,638.72 = 271,109.94 : x
2. Step 2: Convert to fraction form
   485,969.88/670,638.72 = 271,109.94/x
3. Step 3: Cross multiply
   485,969.88x = 670,638.72 × 271,109.94
4. Step 4: Simplify right side
   485,969.88x = 181,816,825,156.36
5. Step 5: Solve for x
   x = 181,816,825,156.36/485,969.88
6. Step 6: Final answer
   x = 374,131.88