Finding the Fourth Proportional to 13,016.56, 19,528.18 and 3,656.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,016.56 : 19,528.18 = 3,656.60 : x
2. Step 2: Convert to fraction form
   13,016.56/19,528.18 = 3,656.60/x
3. Step 3: Cross multiply
   13,016.56x = 19,528.18 × 3,656.60
4. Step 4: Simplify right side
   13,016.56x = 71,406,742.99
5. Step 5: Solve for x
   x = 71,406,742.99/13,016.56
6. Step 6: Final answer
   x = 5,485.84