Finding the Fourth Proportional to 80,185.50, 120,222.81 and 57,709.98

Step by Step Solution

1. Step 1: Write the proportion equation
   80,185.50 : 120,222.81 = 57,709.98 : x
2. Step 2: Convert to fraction form
   80,185.50/120,222.81 = 57,709.98/x
3. Step 3: Cross multiply
   80,185.50x = 120,222.81 × 57,709.98
4. Step 4: Simplify right side
   80,185.50x = 6,938,055,960.64
5. Step 5: Solve for x
   x = 6,938,055,960.64/80,185.50
6. Step 6: Final answer
   x = 86,525.07