Finding the Fourth Proportional to 5,166.60, 7,129.82 and 2,808.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,166.60 : 7,129.82 = 2,808.72 : x
2. Step 2: Convert to fraction form
   5,166.60/7,129.82 = 2,808.72/x
3. Step 3: Cross multiply
   5,166.60x = 7,129.82 × 2,808.72
4. Step 4: Simplify right side
   5,166.60x = 20,025,668.03
5. Step 5: Solve for x
   x = 20,025,668.03/5,166.60
6. Step 6: Final answer
   x = 3,875.99