Finding the Fourth Proportional to 12,921.36, 19,382.51 and 3,562.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921.36 : 19,382.51 = 3,562.12 : x
2. Step 2: Convert to fraction form
   12,921.36/19,382.51 = 3,562.12/x
3. Step 3: Cross multiply
   12,921.36x = 19,382.51 × 3,562.12
4. Step 4: Simplify right side
   12,921.36x = 69,042,826.52
5. Step 5: Solve for x
   x = 69,042,826.52/12,921.36
6. Step 6: Final answer
   x = 5,343.31