Finding the Fourth Proportional to 11,518.61, 15,895.24 and 7,042.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,518.61 : 15,895.24 = 7,042.55 : x
2. Step 2: Convert to fraction form
   11,518.61/15,895.24 = 7,042.55/x
3. Step 3: Cross multiply
   11,518.61x = 15,895.24 × 7,042.55
4. Step 4: Simplify right side
   11,518.61x = 111,942,925.38
5. Step 5: Solve for x
   x = 111,942,925.38/11,518.61
6. Step 6: Final answer
   x = 9,718.44