Finding the Fourth Proportional to 12,939.77, 19,404.89 and 4,617.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,939.77 : 19,404.89 = 4,617.56 : x
2. Step 2: Convert to fraction form
   12,939.77/19,404.89 = 4,617.56/x
3. Step 3: Cross multiply
   12,939.77x = 19,404.89 × 4,617.56
4. Step 4: Simplify right side
   12,939.77x = 89,603,269.29
5. Step 5: Solve for x
   x = 89,603,269.29/12,939.77
6. Step 6: Final answer
   x = 6,924.64