Finding the Fourth Proportional to 105,559.92, 145,672.74 and 57,816.27

Step by Step Solution

1. Step 1: Write the proportion equation
   105,559.92 : 145,672.74 = 57,816.27 : x
2. Step 2: Convert to fraction form
   105,559.92/145,672.74 = 57,816.27/x
3. Step 3: Cross multiply
   105,559.92x = 145,672.74 × 57,816.27
4. Step 4: Simplify right side
   105,559.92x = 8,422,254,467.48
5. Step 5: Solve for x
   x = 8,422,254,467.48/105,559.92
6. Step 6: Final answer
   x = 79,786.48