Finding the Fourth Proportional to 11,556.10, 17,416.72 and 10,912.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,556.10 : 17,416.72 = 10,912.30 : x
2. Step 2: Convert to fraction form
   11,556.10/17,416.72 = 10,912.30/x
3. Step 3: Cross multiply
   11,556.10x = 17,416.72 × 10,912.30
4. Step 4: Simplify right side
   11,556.10x = 190,056,473.66
5. Step 5: Solve for x
   x = 190,056,473.66/11,556.10
6. Step 6: Final answer
   x = 16,446.42