Finding the Fourth Proportional to 11,191.30, 16,789.40 and 3,400.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,191.30 : 16,789.40 = 3,400.72 : x
2. Step 2: Convert to fraction form
   11,191.30/16,789.40 = 3,400.72/x
3. Step 3: Cross multiply
   11,191.30x = 16,789.40 × 3,400.72
4. Step 4: Simplify right side
   11,191.30x = 57,096,048.37
5. Step 5: Solve for x
   x = 57,096,048.37/11,191.30
6. Step 6: Final answer
   x = 5,101.82