Finding the Fourth Proportional to 105,290.67, 145,300.79 and 57,544.01

Step by Step Solution

1. Step 1: Write the proportion equation
   105,290.67 : 145,300.79 = 57,544.01 : x
2. Step 2: Convert to fraction form
   105,290.67/145,300.79 = 57,544.01/x
3. Step 3: Cross multiply
   105,290.67x = 145,300.79 × 57,544.01
4. Step 4: Simplify right side
   105,290.67x = 8,361,189,098.54
5. Step 5: Solve for x
   x = 8,361,189,098.54/105,290.67
6. Step 6: Final answer
   x = 79,410.54