Finding the Fourth Proportional to 13,460.69, 20,189.46 and 3,600.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,460.69 : 20,189.46 = 3,600.74 : x
2. Step 2: Convert to fraction form
   13,460.69/20,189.46 = 3,600.74/x
3. Step 3: Cross multiply
   13,460.69x = 20,189.46 × 3,600.74
4. Step 4: Simplify right side
   13,460.69x = 72,697,046.67
5. Step 5: Solve for x
   x = 72,697,046.67/13,460.69
6. Step 6: Final answer
   x = 5,400.69