Finding the Fourth Proportional to 11,518.16, 15,890.06 and 7,042.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,518.16 : 15,890.06 = 7,042.10 : x
2. Step 2: Convert to fraction form
   11,518.16/15,890.06 = 7,042.10/x
3. Step 3: Cross multiply
   11,518.16x = 15,890.06 × 7,042.10
4. Step 4: Simplify right side
   11,518.16x = 111,899,356.32
5. Step 5: Solve for x
   x = 111,899,356.32/11,518.16
6. Step 6: Final answer
   x = 9,715.04