Finding the Fourth Proportional to 13,895.72, 20,835.34 and 5,579.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,895.72 : 20,835.34 = 5,579.68 : x
2. Step 2: Convert to fraction form
   13,895.72/20,835.34 = 5,579.68/x
3. Step 3: Cross multiply
   13,895.72x = 20,835.34 × 5,579.68
4. Step 4: Simplify right side
   13,895.72x = 116,254,529.89
5. Step 5: Solve for x
   x = 116,254,529.89/13,895.72
6. Step 6: Final answer
   x = 8,366.21