Finding the Fourth Proportional to 11,906.01, 16,429.91 and 7,189.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,906.01 : 16,429.91 = 7,189.47 : x
2. Step 2: Convert to fraction form
   11,906.01/16,429.91 = 7,189.47/x
3. Step 3: Cross multiply
   11,906.01x = 16,429.91 × 7,189.47
4. Step 4: Simplify right side
   11,906.01x = 118,122,309.10
5. Step 5: Solve for x
   x = 118,122,309.10/11,906.01
6. Step 6: Final answer
   x = 9,921.23