Finding the Fourth Proportional to 9,411.69, 12,988.38 and 5,162.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.69 : 12,988.38 = 5,162.94 : x
2. Step 2: Convert to fraction form
   9,411.69/12,988.38 = 5,162.94/x
3. Step 3: Cross multiply
   9,411.69x = 12,988.38 × 5,162.94
4. Step 4: Simplify right side
   9,411.69x = 67,058,226.64
5. Step 5: Solve for x
   x = 67,058,226.64/9,411.69
6. Step 6: Final answer
   x = 7,124.99