Finding the Fourth Proportional to 80,965.50, 111,742.14 and 47,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,965.50 : 111,742.14 = 47,431.50 : x
2. Step 2: Convert to fraction form
   80,965.50/111,742.14 = 47,431.50/x
3. Step 3: Cross multiply
   80,965.50x = 111,742.14 × 47,431.50
4. Step 4: Simplify right side
   80,965.50x = 5,300,097,313.41
5. Step 5: Solve for x
   x = 5,300,097,313.41/80,965.50
6. Step 6: Final answer
   x = 65,461.18