Finding the Fourth Proportional to 12,693.36, 19,020.51 and 5,291.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,693.36 : 19,020.51 = 5,291.58 : x
2. Step 2: Convert to fraction form
   12,693.36/19,020.51 = 5,291.58/x
3. Step 3: Cross multiply
   12,693.36x = 19,020.51 × 5,291.58
4. Step 4: Simplify right side
   12,693.36x = 100,648,550.31
5. Step 5: Solve for x
   x = 100,648,550.31/12,693.36
6. Step 6: Final answer
   x = 7,929.23