Finding the Fourth Proportional to 8,969.62, 12,375.03 and 5,191.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,969.62 : 12,375.03 = 5,191.78 : x
2. Step 2: Convert to fraction form
   8,969.62/12,375.03 = 5,191.78/x
3. Step 3: Cross multiply
   8,969.62x = 12,375.03 × 5,191.78
4. Step 4: Simplify right side
   8,969.62x = 64,248,433.25
5. Step 5: Solve for x
   x = 64,248,433.25/8,969.62
6. Step 6: Final answer
   x = 7,162.89