Finding the Fourth Proportional to 12,949.47, 19,428.31 and 4,629.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,949.47 : 19,428.31 = 4,629.31 : x
2. Step 2: Convert to fraction form
   12,949.47/19,428.31 = 4,629.31/x
3. Step 3: Cross multiply
   12,949.47x = 19,428.31 × 4,629.31
4. Step 4: Simplify right side
   12,949.47x = 89,939,626.98
5. Step 5: Solve for x
   x = 89,939,626.98/12,949.47
6. Step 6: Final answer
   x = 6,945.43