Finding the Fourth Proportional to 12,137.56, 18,208.42 and 5,564.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,137.56 : 18,208.42 = 5,564.31 : x
2. Step 2: Convert to fraction form
   12,137.56/18,208.42 = 5,564.31/x
3. Step 3: Cross multiply
   12,137.56x = 18,208.42 × 5,564.31
4. Step 4: Simplify right side
   12,137.56x = 101,317,211.30
5. Step 5: Solve for x
   x = 101,317,211.30/12,137.56
6. Step 6: Final answer
   x = 8,347.41