Finding the Fourth Proportional to 9,178.52, 12,661.77 and 7,158.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,178.52 : 12,661.77 = 7,158.27 : x
2. Step 2: Convert to fraction form
   9,178.52/12,661.77 = 7,158.27/x
3. Step 3: Cross multiply
   9,178.52x = 12,661.77 × 7,158.27
4. Step 4: Simplify right side
   9,178.52x = 90,636,402.40
5. Step 5: Solve for x
   x = 90,636,402.40/9,178.52
6. Step 6: Final answer
   x = 9,874.84