Finding the Fourth Proportional to 13,047.42, 19,571.37 and 3,186.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,047.42 : 19,571.37 = 3,186.78 : x
2. Step 2: Convert to fraction form
   13,047.42/19,571.37 = 3,186.78/x
3. Step 3: Cross multiply
   13,047.42x = 19,571.37 × 3,186.78
4. Step 4: Simplify right side
   13,047.42x = 62,369,650.49
5. Step 5: Solve for x
   x = 62,369,650.49/13,047.42
6. Step 6: Final answer
   x = 4,780.23