Finding the Fourth Proportional to 12,591.56, 18,861.41 and 7,384.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,591.56 : 18,861.41 = 7,384.88 : x
2. Step 2: Convert to fraction form
   12,591.56/18,861.41 = 7,384.88/x
3. Step 3: Cross multiply
   12,591.56x = 18,861.41 × 7,384.88
4. Step 4: Simplify right side
   12,591.56x = 139,289,118.25
5. Step 5: Solve for x
   x = 139,289,118.25/12,591.56
6. Step 6: Final answer
   x = 11,062.11