Finding the Fourth Proportional to 11,115.72, 16,686.72 and 4,547.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,115.72 : 16,686.72 = 4,547.16 : x
2. Step 2: Convert to fraction form
   11,115.72/16,686.72 = 4,547.16/x
3. Step 3: Cross multiply
   11,115.72x = 16,686.72 × 4,547.16
4. Step 4: Simplify right side
   11,115.72x = 75,877,185.72
5. Step 5: Solve for x
   x = 75,877,185.72/11,115.72
6. Step 6: Final answer
   x = 6,826.12