Finding the Fourth Proportional to 13,167.72, 19,748.65 and 3,805.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,167.72 : 19,748.65 = 3,805.69 : x
2. Step 2: Convert to fraction form
   13,167.72/19,748.65 = 3,805.69/x
3. Step 3: Cross multiply
   13,167.72x = 19,748.65 × 3,805.69
4. Step 4: Simplify right side
   13,167.72x = 75,157,230.30
5. Step 5: Solve for x
   x = 75,157,230.30/13,167.72
6. Step 6: Final answer
   x = 5,707.69