Finding the Fourth Proportional to 11,215.55, 16,805.10 and 7,048.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,215.55 : 16,805.10 = 7,048.10 : x
2. Step 2: Convert to fraction form
   11,215.55/16,805.10 = 7,048.10/x
3. Step 3: Cross multiply
   11,215.55x = 16,805.10 × 7,048.10
4. Step 4: Simplify right side
   11,215.55x = 118,444,025.31
5. Step 5: Solve for x
   x = 118,444,025.31/11,215.55
6. Step 6: Final answer
   x = 10,560.70