Finding the Fourth Proportional to 12,620.37, 18,921.72 and 5,596.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,620.37 : 18,921.72 = 5,596.59 : x
2. Step 2: Convert to fraction form
   12,620.37/18,921.72 = 5,596.59/x
3. Step 3: Cross multiply
   12,620.37x = 18,921.72 × 5,596.59
4. Step 4: Simplify right side
   12,620.37x = 105,897,108.93
5. Step 5: Solve for x
   x = 105,897,108.93/12,620.37
6. Step 6: Final answer
   x = 8,390.97