Finding the Fourth Proportional to 105,704.24, 145,870.74 and 57,957.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,704.24 : 145,870.74 = 57,957.48 : x
2. Step 2: Convert to fraction form
   105,704.24/145,870.74 = 57,957.48/x
3. Step 3: Cross multiply
   105,704.24x = 145,870.74 × 57,957.48
4. Step 4: Simplify right side
   105,704.24x = 8,454,300,496.14
5. Step 5: Solve for x
   x = 8,454,300,496.14/105,704.24
6. Step 6: Final answer
   x = 79,980.71