Finding the Fourth Proportional to 13,215.09, 19,807.52 and 5,414.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,215.09 : 19,807.52 = 5,414.25 : x
2. Step 2: Convert to fraction form
   13,215.09/19,807.52 = 5,414.25/x
3. Step 3: Cross multiply
   13,215.09x = 19,807.52 × 5,414.25
4. Step 4: Simplify right side
   13,215.09x = 107,242,838.09
5. Step 5: Solve for x
   x = 107,242,838.09/13,215.09
6. Step 6: Final answer
   x = 8,115.18