Finding the Fourth Proportional to 12,945.84, 19,418.56 and 3,711.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.84 : 19,418.56 = 3,711.84 : x
2. Step 2: Convert to fraction form
   12,945.84/19,418.56 = 3,711.84/x
3. Step 3: Cross multiply
   12,945.84x = 19,418.56 × 3,711.84
4. Step 4: Simplify right side
   12,945.84x = 72,078,587.75
5. Step 5: Solve for x
   x = 72,078,587.75/12,945.84
6. Step 6: Final answer
   x = 5,567.70