Finding the Fourth Proportional to 7,111.89, 10,670.27 and 3,165.57

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.89 : 10,670.27 = 3,165.57 : x
2. Step 2: Convert to fraction form
   7,111.89/10,670.27 = 3,165.57/x
3. Step 3: Cross multiply
   7,111.89x = 10,670.27 × 3,165.57
4. Step 4: Simplify right side
   7,111.89x = 33,777,470.78
5. Step 5: Solve for x
   x = 33,777,470.78/7,111.89
6. Step 6: Final answer
   x = 4,749.44