Finding the Fourth Proportional to 31,819.56, 47,745.72 and 13,113.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,819.56 : 47,745.72 = 13,113.42 : x
2. Step 2: Convert to fraction form
   31,819.56/47,745.72 = 13,113.42/x
3. Step 3: Cross multiply
   31,819.56x = 47,745.72 × 13,113.42
4. Step 4: Simplify right side
   31,819.56x = 626,109,679.56
5. Step 5: Solve for x
   x = 626,109,679.56/31,819.56
6. Step 6: Final answer
   x = 19,676.88