Finding the Fourth Proportional to 13,142.50, 19,707.81 and 3,780.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.50 : 19,707.81 = 3,780.37 : x
2. Step 2: Convert to fraction form
   13,142.50/19,707.81 = 3,780.37/x
3. Step 3: Cross multiply
   13,142.50x = 19,707.81 × 3,780.37
4. Step 4: Simplify right side
   13,142.50x = 74,502,813.69
5. Step 5: Solve for x
   x = 74,502,813.69/13,142.50
6. Step 6: Final answer
   x = 5,668.85