Finding the Fourth Proportional to 80,205.28, 110,667.60 and 50,380

Step by Step Solution

1. Step 1: Write the proportion equation
   80,205.28 : 110,667.60 = 50,380 : x
2. Step 2: Convert to fraction form
   80,205.28/110,667.60 = 50,380/x
3. Step 3: Cross multiply
   80,205.28x = 110,667.60 × 50,380
4. Step 4: Simplify right side
   80,205.28x = 5,575,433,688
5. Step 5: Solve for x
   x = 5,575,433,688/80,205.28
6. Step 6: Final answer
   x = 69,514.55