Finding the Fourth Proportional to 13,314.76, 18,357.31 and 10,916.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,314.76 : 18,357.31 = 10,916.04 : x
2. Step 2: Convert to fraction form
   13,314.76/18,357.31 = 10,916.04/x
3. Step 3: Cross multiply
   13,314.76x = 18,357.31 × 10,916.04
4. Step 4: Simplify right side
   13,314.76x = 200,389,130.25
5. Step 5: Solve for x
   x = 200,389,130.25/13,314.76
6. Step 6: Final answer
   x = 15,050.15