Finding the Fourth Proportional to 8,963.34, 12,369.15 and 5,187.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,963.34 : 12,369.15 = 5,187.12 : x
2. Step 2: Convert to fraction form
   8,963.34/12,369.15 = 5,187.12/x
3. Step 3: Cross multiply
   8,963.34x = 12,369.15 × 5,187.12
4. Step 4: Simplify right side
   8,963.34x = 64,160,265.35
5. Step 5: Solve for x
   x = 64,160,265.35/8,963.34
6. Step 6: Final answer
   x = 7,158.08