Finding the Fourth Proportional to 9,164.62, 12,646.11 and 5,131.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,164.62 : 12,646.11 = 5,131.68 : x
2. Step 2: Convert to fraction form
   9,164.62/12,646.11 = 5,131.68/x
3. Step 3: Cross multiply
   9,164.62x = 12,646.11 × 5,131.68
4. Step 4: Simplify right side
   9,164.62x = 64,895,789.76
5. Step 5: Solve for x
   x = 64,895,789.76/9,164.62
6. Step 6: Final answer
   x = 7,081.12