Finding the Fourth Proportional to 11,128.56, 16,698.51 and 5,285.22

Step by Step Solution

1. Step 1: Write the proportion equation
   11,128.56 : 16,698.51 = 5,285.22 : x
2. Step 2: Convert to fraction form
   11,128.56/16,698.51 = 5,285.22/x
3. Step 3: Cross multiply
   11,128.56x = 16,698.51 × 5,285.22
4. Step 4: Simplify right side
   11,128.56x = 88,255,299.02
5. Step 5: Solve for x
   x = 88,255,299.02/11,128.56
6. Step 6: Final answer
   x = 7,930.52