Finding the Fourth Proportional to 12,369.31, 17,077.43 and 8,591.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,369.31 : 17,077.43 = 8,591.27 : x
2. Step 2: Convert to fraction form
   12,369.31/17,077.43 = 8,591.27/x
3. Step 3: Cross multiply
   12,369.31x = 17,077.43 × 8,591.27
4. Step 4: Simplify right side
   12,369.31x = 146,716,748.13
5. Step 5: Solve for x
   x = 146,716,748.13/12,369.31
6. Step 6: Final answer
   x = 11,861.36