Finding the Fourth Proportional to 9,781.96, 14,671.30 and 3,540.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,781.96 : 14,671.30 = 3,540.79 : x
2. Step 2: Convert to fraction form
   9,781.96/14,671.30 = 3,540.79/x
3. Step 3: Cross multiply
   9,781.96x = 14,671.30 × 3,540.79
4. Step 4: Simplify right side
   9,781.96x = 51,947,992.33
5. Step 5: Solve for x
   x = 51,947,992.33/9,781.96
6. Step 6: Final answer
   x = 5,310.59