Finding the Fourth Proportional to 12,402.37, 18,603.31 and 3,637.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.37 : 18,603.31 = 3,637.09 : x
2. Step 2: Convert to fraction form
   12,402.37/18,603.31 = 3,637.09/x
3. Step 3: Cross multiply
   12,402.37x = 18,603.31 × 3,637.09
4. Step 4: Simplify right side
   12,402.37x = 67,661,912.77
5. Step 5: Solve for x
   x = 67,661,912.77/12,402.37
6. Step 6: Final answer
   x = 5,455.56