Finding the Fourth Proportional to 12,947.12, 19,419.24 and 4,626.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,947.12 : 19,419.24 = 4,626.80 : x
2. Step 2: Convert to fraction form
   12,947.12/19,419.24 = 4,626.80/x
3. Step 3: Cross multiply
   12,947.12x = 19,419.24 × 4,626.80
4. Step 4: Simplify right side
   12,947.12x = 89,848,939.63
5. Step 5: Solve for x
   x = 89,848,939.63/12,947.12
6. Step 6: Final answer
   x = 6,939.69