Finding the Fourth Proportional to 13,591.72, 18,747.94 and 9,820.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,591.72 : 18,747.94 = 9,820.42 : x
2. Step 2: Convert to fraction form
   13,591.72/18,747.94 = 9,820.42/x
3. Step 3: Cross multiply
   13,591.72x = 18,747.94 × 9,820.42
4. Step 4: Simplify right side
   13,591.72x = 184,112,644.93
5. Step 5: Solve for x
   x = 184,112,644.93/13,591.72
6. Step 6: Final answer
   x = 13,545.94