Finding the Fourth Proportional to 80,780.06, 111,479.06 and 50,555.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,780.06 : 111,479.06 = 50,555.72 : x
2. Step 2: Convert to fraction form
   80,780.06/111,479.06 = 50,555.72/x
3. Step 3: Cross multiply
   80,780.06x = 111,479.06 × 50,555.72
4. Step 4: Simplify right side
   80,780.06x = 5,635,904,548.31
5. Step 5: Solve for x
   x = 5,635,904,548.31/80,780.06
6. Step 6: Final answer
   x = 69,768.51