Finding the Fourth Proportional to 13,315.92, 19,973.82 and 3,454.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,315.92 : 19,973.82 = 3,454.38 : x
2. Step 2: Convert to fraction form
   13,315.92/19,973.82 = 3,454.38/x
3. Step 3: Cross multiply
   13,315.92x = 19,973.82 × 3,454.38
4. Step 4: Simplify right side
   13,315.92x = 68,997,164.33
5. Step 5: Solve for x
   x = 68,997,164.33/13,315.92
6. Step 6: Final answer
   x = 5,181.55