Finding the Fourth Proportional to 8,081.31, 11,153.74 and 5,057.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,081.31 : 11,153.74 = 5,057.83 : x
2. Step 2: Convert to fraction form
   8,081.31/11,153.74 = 5,057.83/x
3. Step 3: Cross multiply
   8,081.31x = 11,153.74 × 5,057.83
4. Step 4: Simplify right side
   8,081.31x = 56,413,736.02
5. Step 5: Solve for x
   x = 56,413,736.02/8,081.31
6. Step 6: Final answer
   x = 6,980.77