Finding the Fourth Proportional to 12,189.72, 18,274.50 and 5,610.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,189.72 : 18,274.50 = 5,610.36 : x
2. Step 2: Convert to fraction form
   12,189.72/18,274.50 = 5,610.36/x
3. Step 3: Cross multiply
   12,189.72x = 18,274.50 × 5,610.36
4. Step 4: Simplify right side
   12,189.72x = 102,526,523.82
5. Step 5: Solve for x
   x = 102,526,523.82/12,189.72
6. Step 6: Final answer
   x = 8,410.90