Finding the Fourth Proportional to 11,406.52, 17,109.83 and 11,390.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,406.52 : 17,109.83 = 11,390.12 : x
2. Step 2: Convert to fraction form
   11,406.52/17,109.83 = 11,390.12/x
3. Step 3: Cross multiply
   11,406.52x = 17,109.83 × 11,390.12
4. Step 4: Simplify right side
   11,406.52x = 194,883,016.88
5. Step 5: Solve for x
   x = 194,883,016.88/11,406.52
6. Step 6: Final answer
   x = 17,085.23