Finding the Fourth Proportional to 13,484.89, 18,608.63 and 7,819.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,484.89 : 18,608.63 = 7,819.87 : x
2. Step 2: Convert to fraction form
   13,484.89/18,608.63 = 7,819.87/x
3. Step 3: Cross multiply
   13,484.89x = 18,608.63 × 7,819.87
4. Step 4: Simplify right side
   13,484.89x = 145,517,067.48
5. Step 5: Solve for x
   x = 145,517,067.48/13,484.89
6. Step 6: Final answer
   x = 10,791.12