Finding the Fourth Proportional to 13,185.63, 19,781.61 and 5,394.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.63 : 19,781.61 = 5,394.46 : x
2. Step 2: Convert to fraction form
   13,185.63/19,781.61 = 5,394.46/x
3. Step 3: Cross multiply
   13,185.63x = 19,781.61 × 5,394.46
4. Step 4: Simplify right side
   13,185.63x = 106,711,103.88
5. Step 5: Solve for x
   x = 106,711,103.88/13,185.63
6. Step 6: Final answer
   x = 8,092.98