Finding the Fourth Proportional to 8,077.91, 12,111.91 and 3,141.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,077.91 : 12,111.91 = 3,141.80 : x
2. Step 2: Convert to fraction form
   8,077.91/12,111.91 = 3,141.80/x
3. Step 3: Cross multiply
   8,077.91x = 12,111.91 × 3,141.80
4. Step 4: Simplify right side
   8,077.91x = 38,053,175.84
5. Step 5: Solve for x
   x = 38,053,175.84/8,077.91
6. Step 6: Final answer
   x = 4,710.77