Finding the Fourth Proportional to 12,591.89, 18,872.35 and 5,564.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,591.89 : 18,872.35 = 5,564.33 : x
2. Step 2: Convert to fraction form
   12,591.89/18,872.35 = 5,564.33/x
3. Step 3: Cross multiply
   12,591.89x = 18,872.35 × 5,564.33
4. Step 4: Simplify right side
   12,591.89x = 105,011,955.45
5. Step 5: Solve for x
   x = 105,011,955.45/12,591.89
6. Step 6: Final answer
   x = 8,339.65