Finding the Fourth Proportional to 13,559.86, 18,712.42 and 7,591.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,559.86 : 18,712.42 = 7,591.52 : x
2. Step 2: Convert to fraction form
   13,559.86/18,712.42 = 7,591.52/x
3. Step 3: Cross multiply
   13,559.86x = 18,712.42 × 7,591.52
4. Step 4: Simplify right side
   13,559.86x = 142,055,738.48
5. Step 5: Solve for x
   x = 142,055,738.48/13,559.86
6. Step 6: Final answer
   x = 10,476.20