Finding the Fourth Proportional to 10,215.54, 15,326.06 and 3,643.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215.54 : 15,326.06 = 3,643.61 : x
2. Step 2: Convert to fraction form
   10,215.54/15,326.06 = 3,643.61/x
3. Step 3: Cross multiply
   10,215.54x = 15,326.06 × 3,643.61
4. Step 4: Simplify right side
   10,215.54x = 55,842,090.63
5. Step 5: Solve for x
   x = 55,842,090.63/10,215.54
6. Step 6: Final answer
   x = 5,466.39