Finding the Fourth Proportional to 9,411.36, 12,987.46 and 5,162.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.36 : 12,987.46 = 5,162.24 : x
2. Step 2: Convert to fraction form
   9,411.36/12,987.46 = 5,162.24/x
3. Step 3: Cross multiply
   9,411.36x = 12,987.46 × 5,162.24
4. Step 4: Simplify right side
   9,411.36x = 67,044,385.51
5. Step 5: Solve for x
   x = 67,044,385.51/9,411.36
6. Step 6: Final answer
   x = 7,123.77