Finding the Fourth Proportional to 11,498.45, 15,865.04 and 7,020.57

Step by Step Solution

1. Step 1: Write the proportion equation
   11,498.45 : 15,865.04 = 7,020.57 : x
2. Step 2: Convert to fraction form
   11,498.45/15,865.04 = 7,020.57/x
3. Step 3: Cross multiply
   11,498.45x = 15,865.04 × 7,020.57
4. Step 4: Simplify right side
   11,498.45x = 111,381,544.55
5. Step 5: Solve for x
   x = 111,381,544.55/11,498.45
6. Step 6: Final answer
   x = 9,686.66