Finding the Fourth Proportional to 8,969.58, 12,375.72 and 5,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,969.58 : 12,375.72 = 5,431.50 : x
2. Step 2: Convert to fraction form
   8,969.58/12,375.72 = 5,431.50/x
3. Step 3: Cross multiply
   8,969.58x = 12,375.72 × 5,431.50
4. Step 4: Simplify right side
   8,969.58x = 67,218,723.18
5. Step 5: Solve for x
   x = 67,218,723.18/8,969.58
6. Step 6: Final answer
   x = 7,494.08