Finding the Fourth Proportional to 10,538.68, 15,808.55 and 3,518.41

Step by Step Solution

1. Step 1: Write the proportion equation
   10,538.68 : 15,808.55 = 3,518.41 : x
2. Step 2: Convert to fraction form
   10,538.68/15,808.55 = 3,518.41/x
3. Step 3: Cross multiply
   10,538.68x = 15,808.55 × 3,518.41
4. Step 4: Simplify right side
   10,538.68x = 55,621,012.03
5. Step 5: Solve for x
   x = 55,621,012.03/10,538.68
6. Step 6: Final answer
   x = 5,277.80