Finding the Fourth Proportional to 19,607.40, 29,404.84 and 6,456.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,607.40 : 29,404.84 = 6,456.72 : x
2. Step 2: Convert to fraction form
   19,607.40/29,404.84 = 6,456.72/x
3. Step 3: Cross multiply
   19,607.40x = 29,404.84 × 6,456.72
4. Step 4: Simplify right side
   19,607.40x = 189,858,818.52
5. Step 5: Solve for x
   x = 189,858,818.52/19,607.40
6. Step 6: Final answer
   x = 9,683.02