Finding the Fourth Proportional to 9,179.08, 12,666.72 and 5,199.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,179.08 : 12,666.72 = 5,199.96 : x
2. Step 2: Convert to fraction form
   9,179.08/12,666.72 = 5,199.96/x
3. Step 3: Cross multiply
   9,179.08x = 12,666.72 × 5,199.96
4. Step 4: Simplify right side
   9,179.08x = 65,866,437.33
5. Step 5: Solve for x
   x = 65,866,437.33/9,179.08
6. Step 6: Final answer
   x = 7,175.71