Finding the Fourth Proportional to 80,669.72, 111,307.82 and 47,129.24

Step by Step Solution

1. Step 1: Write the proportion equation
   80,669.72 : 111,307.82 = 47,129.24 : x
2. Step 2: Convert to fraction form
   80,669.72/111,307.82 = 47,129.24/x
3. Step 3: Cross multiply
   80,669.72x = 111,307.82 × 47,129.24
4. Step 4: Simplify right side
   80,669.72x = 5,245,852,962.66
5. Step 5: Solve for x
   x = 5,245,852,962.66/80,669.72
6. Step 6: Final answer
   x = 65,028.77