Finding the Fourth Proportional to 8,488.95, 11,714.88 and 5,131.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,488.95 : 11,714.88 = 5,131.31 : x
2. Step 2: Convert to fraction form
   8,488.95/11,714.88 = 5,131.31/x
3. Step 3: Cross multiply
   8,488.95x = 11,714.88 × 5,131.31
4. Step 4: Simplify right side
   8,488.95x = 60,112,622.32
5. Step 5: Solve for x
   x = 60,112,622.32/8,488.95
6. Step 6: Final answer
   x = 7,081.28