Finding the Fourth Proportional to 105,559.98, 145,672.98 and 57,162.44

Step by Step Solution

1. Step 1: Write the proportion equation
   105,559.98 : 145,672.98 = 57,162.44 : x
2. Step 2: Convert to fraction form
   105,559.98/145,672.98 = 57,162.44/x
3. Step 3: Cross multiply
   105,559.98x = 145,672.98 × 57,162.44
4. Step 4: Simplify right side
   105,559.98x = 8,327,022,978.87
5. Step 5: Solve for x
   x = 8,327,022,978.87/105,559.98
6. Step 6: Final answer
   x = 78,884.28