Finding the Fourth Proportional to 12,934.56, 19,398.96 and 5,141.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,934.56 : 19,398.96 = 5,141.28 : x
2. Step 2: Convert to fraction form
   12,934.56/19,398.96 = 5,141.28/x
3. Step 3: Cross multiply
   12,934.56x = 19,398.96 × 5,141.28
4. Step 4: Simplify right side
   12,934.56x = 99,735,485.07
5. Step 5: Solve for x
   x = 99,735,485.07/12,934.56
6. Step 6: Final answer
   x = 7,710.78