Finding the Fourth Proportional to 12,601.37, 18,892.78 and 4,279.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,601.37 : 18,892.78 = 4,279.15 : x
2. Step 2: Convert to fraction form
   12,601.37/18,892.78 = 4,279.15/x
3. Step 3: Cross multiply
   12,601.37x = 18,892.78 × 4,279.15
4. Step 4: Simplify right side
   12,601.37x = 80,844,981.61
5. Step 5: Solve for x
   x = 80,844,981.61/12,601.37
6. Step 6: Final answer
   x = 6,415.57