Finding the Fourth Proportional to 105,559.83, 145,667.16 and 57,803.95

Step by Step Solution

1. Step 1: Write the proportion equation
   105,559.83 : 145,667.16 = 57,803.95 : x
2. Step 2: Convert to fraction form
   105,559.83/145,667.16 = 57,803.95/x
3. Step 3: Cross multiply
   105,559.83x = 145,667.16 × 57,803.95
4. Step 4: Simplify right side
   105,559.83x = 8,420,137,233.28
5. Step 5: Solve for x
   x = 8,420,137,233.28/105,559.83
6. Step 6: Final answer
   x = 79,766.49