Finding the Fourth Proportional to 15,559.03, 21,471.37 and 8,485.30

Step by Step Solution

1. Step 1: Write the proportion equation
   15,559.03 : 21,471.37 = 8,485.30 : x
2. Step 2: Convert to fraction form
   15,559.03/21,471.37 = 8,485.30/x
3. Step 3: Cross multiply
   15,559.03x = 21,471.37 × 8,485.30
4. Step 4: Simplify right side
   15,559.03x = 182,191,015.86
5. Step 5: Solve for x
   x = 182,191,015.86/15,559.03
6. Step 6: Final answer
   x = 11,709.66