Finding the Fourth Proportional to 9,410.51, 12,986.16 and 5,161.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.51 : 12,986.16 = 5,161.46 : x
2. Step 2: Convert to fraction form
   9,410.51/12,986.16 = 5,161.46/x
3. Step 3: Cross multiply
   9,410.51x = 12,986.16 × 5,161.46
4. Step 4: Simplify right side
   9,410.51x = 67,027,461.11
5. Step 5: Solve for x
   x = 67,027,461.11/9,410.51
6. Step 6: Final answer
   x = 7,122.62