Finding the Fourth Proportional to 11,106.72, 16,665.48 and 5,256.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,106.72 : 16,665.48 = 5,256.36 : x
2. Step 2: Convert to fraction form
   11,106.72/16,665.48 = 5,256.36/x
3. Step 3: Cross multiply
   11,106.72x = 16,665.48 × 5,256.36
4. Step 4: Simplify right side
   11,106.72x = 87,599,762.45
5. Step 5: Solve for x
   x = 87,599,762.45/11,106.72
6. Step 6: Final answer
   x = 7,887.10