Finding the Fourth Proportional to 80,340.50, 110,823.72 and 50,111.30

Step by Step Solution

1. Step 1: Write the proportion equation
   80,340.50 : 110,823.72 = 50,111.30 : x
2. Step 2: Convert to fraction form
   80,340.50/110,823.72 = 50,111.30/x
3. Step 3: Cross multiply
   80,340.50x = 110,823.72 × 50,111.30
4. Step 4: Simplify right side
   80,340.50x = 5,553,520,680.04
5. Step 5: Solve for x
   x = 5,553,520,680.04/80,340.50
6. Step 6: Final answer
   x = 69,124.80