Finding the Fourth Proportional to 11,350.87, 17,020.45 and 5,105.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,350.87 : 17,020.45 = 5,105.55 : x
2. Step 2: Convert to fraction form
   11,350.87/17,020.45 = 5,105.55/x
3. Step 3: Cross multiply
   11,350.87x = 17,020.45 × 5,105.55
4. Step 4: Simplify right side
   11,350.87x = 86,898,758.50
5. Step 5: Solve for x
   x = 86,898,758.50/11,350.87
6. Step 6: Final answer
   x = 7,655.69