Finding the Fourth Proportional to 13,191.34, 19,788.36 and 4,426.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.34 : 19,788.36 = 4,426.42 : x
2. Step 2: Convert to fraction form
   13,191.34/19,788.36 = 4,426.42/x
3. Step 3: Cross multiply
   13,191.34x = 19,788.36 × 4,426.42
4. Step 4: Simplify right side
   13,191.34x = 87,591,592.47
5. Step 5: Solve for x
   x = 87,591,592.47/13,191.34
6. Step 6: Final answer
   x = 6,640.08