Finding the Fourth Proportional to 80,985.50, 111,769.74 and 47,451.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,985.50 : 111,769.74 = 47,451.50 : x
2. Step 2: Convert to fraction form
   80,985.50/111,769.74 = 47,451.50/x
3. Step 3: Cross multiply
   80,985.50x = 111,769.74 × 47,451.50
4. Step 4: Simplify right side
   80,985.50x = 5,303,641,817.61
5. Step 5: Solve for x
   x = 5,303,641,817.61/80,985.50
6. Step 6: Final answer
   x = 65,488.78