Finding the Fourth Proportional to 13,291.92, 19,931.10 and 4,404.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,291.92 : 19,931.10 = 4,404.05 : x
2. Step 2: Convert to fraction form
   13,291.92/19,931.10 = 4,404.05/x
3. Step 3: Cross multiply
   13,291.92x = 19,931.10 × 4,404.05
4. Step 4: Simplify right side
   13,291.92x = 87,777,461.30
5. Step 5: Solve for x
   x = 87,777,461.30/13,291.92
6. Step 6: Final answer
   x = 6,603.82