Finding the Fourth Proportional to 13,581.86, 18,743.00 and 7,916.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,581.86 : 18,743.00 = 7,916.18 : x
2. Step 2: Convert to fraction form
   13,581.86/18,743.00 = 7,916.18/x
3. Step 3: Cross multiply
   13,581.86x = 18,743.00 × 7,916.18
4. Step 4: Simplify right side
   13,581.86x = 148,372,828.44
5. Step 5: Solve for x
   x = 148,372,828.44/13,581.86
6. Step 6: Final answer
   x = 10,924.34