Finding the Fourth Proportional to 10,111.40, 15,166.34 and 3,871.97

Step by Step Solution

1. Step 1: Write the proportion equation
   10,111.40 : 15,166.34 = 3,871.97 : x
2. Step 2: Convert to fraction form
   10,111.40/15,166.34 = 3,871.97/x
3. Step 3: Cross multiply
   10,111.40x = 15,166.34 × 3,871.97
4. Step 4: Simplify right side
   10,111.40x = 58,723,518.30
5. Step 5: Solve for x
   x = 58,723,518.30/10,111.40
6. Step 6: Final answer
   x = 5,807.66