Finding the Fourth Proportional to 13,778.82, 19,005.90 and 9,469.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,778.82 : 19,005.90 = 9,469.86 : x
2. Step 2: Convert to fraction form
   13,778.82/19,005.90 = 9,469.86/x
3. Step 3: Cross multiply
   13,778.82x = 19,005.90 × 9,469.86
4. Step 4: Simplify right side
   13,778.82x = 179,983,212.17
5. Step 5: Solve for x
   x = 179,983,212.17/13,778.82
6. Step 6: Final answer
   x = 13,062.31