Finding the Fourth Proportional to 81,760.82, 112,860.77 and 47,780.38

Step by Step Solution

1. Step 1: Write the proportion equation
   81,760.82 : 112,860.77 = 47,780.38 : x
2. Step 2: Convert to fraction form
   81,760.82/112,860.77 = 47,780.38/x
3. Step 3: Cross multiply
   81,760.82x = 112,860.77 × 47,780.38
4. Step 4: Simplify right side
   81,760.82x = 5,392,530,477.69
5. Step 5: Solve for x
   x = 5,392,530,477.69/81,760.82
6. Step 6: Final answer
   x = 65,954.95