Finding the Fourth Proportional to 11,054.34, 16,617.96 and 10,242.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,054.34 : 16,617.96 = 10,242.72 : x
2. Step 2: Convert to fraction form
   11,054.34/16,617.96 = 10,242.72/x
3. Step 3: Cross multiply
   11,054.34x = 16,617.96 × 10,242.72
4. Step 4: Simplify right side
   11,054.34x = 170,213,111.25
5. Step 5: Solve for x
   x = 170,213,111.25/11,054.34
6. Step 6: Final answer
   x = 15,397.85