Finding the Fourth Proportional to 105,131.32, 145,075.73 and 57,375.41

Step by Step Solution

1. Step 1: Write the proportion equation
   105,131.32 : 145,075.73 = 57,375.41 : x
2. Step 2: Convert to fraction form
   105,131.32/145,075.73 = 57,375.41/x
3. Step 3: Cross multiply
   105,131.32x = 145,075.73 × 57,375.41
4. Step 4: Simplify right side
   105,131.32x = 8,323,778,477.54
5. Step 5: Solve for x
   x = 8,323,778,477.54/105,131.32
6. Step 6: Final answer
   x = 79,175.06