Finding the Fourth Proportional to 13,614.01, 18,773.52 and 12,820.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,614.01 : 18,773.52 = 12,820.30 : x
2. Step 2: Convert to fraction form
   13,614.01/18,773.52 = 12,820.30/x
3. Step 3: Cross multiply
   13,614.01x = 18,773.52 × 12,820.30
4. Step 4: Simplify right side
   13,614.01x = 240,682,158.46
5. Step 5: Solve for x
   x = 240,682,158.46/13,614.01
6. Step 6: Final answer
   x = 17,679.01