Finding the Fourth Proportional to 14,064.87, 19,408.89 and 7,691.31

Step by Step Solution

1. Step 1: Write the proportion equation
   14,064.87 : 19,408.89 = 7,691.31 : x
2. Step 2: Convert to fraction form
   14,064.87/19,408.89 = 7,691.31/x
3. Step 3: Cross multiply
   14,064.87x = 19,408.89 × 7,691.31
4. Step 4: Simplify right side
   14,064.87x = 149,279,789.75
5. Step 5: Solve for x
   x = 149,279,789.75/14,064.87
6. Step 6: Final answer
   x = 10,613.66