Finding the Fourth Proportional to 12,949.77, 19,425.47 and 5,158.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,949.77 : 19,425.47 = 5,158.38 : x
2. Step 2: Convert to fraction form
   12,949.77/19,425.47 = 5,158.38/x
3. Step 3: Cross multiply
   12,949.77x = 19,425.47 × 5,158.38
4. Step 4: Simplify right side
   12,949.77x = 100,203,955.94
5. Step 5: Solve for x
   x = 100,203,955.94/12,949.77
6. Step 6: Final answer
   x = 7,737.89