Finding the Fourth Proportional to 105,049.98, 144,969.75 and 57,303.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,049.98 : 144,969.75 = 57,303.72 : x
2. Step 2: Convert to fraction form
   105,049.98/144,969.75 = 57,303.72/x
3. Step 3: Cross multiply
   105,049.98x = 144,969.75 × 57,303.72
4. Step 4: Simplify right side
   105,049.98x = 8,307,305,962.47
5. Step 5: Solve for x
   x = 8,307,305,962.47/105,049.98
6. Step 6: Final answer
   x = 79,079.56