Finding the Fourth Proportional to 13,581.73, 18,742.82 and 7,916.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,581.73 : 18,742.82 = 7,916.05 : x
2. Step 2: Convert to fraction form
   13,581.73/18,742.82 = 7,916.05/x
3. Step 3: Cross multiply
   13,581.73x = 18,742.82 × 7,916.05
4. Step 4: Simplify right side
   13,581.73x = 148,369,100.26
5. Step 5: Solve for x
   x = 148,369,100.26/13,581.73
6. Step 6: Final answer
   x = 10,924.17