Finding the Fourth Proportional to 31,788.72, 47,680.96 and 13,063.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,788.72 : 47,680.96 = 13,063.91 : x
2. Step 2: Convert to fraction form
   31,788.72/47,680.96 = 13,063.91/x
3. Step 3: Cross multiply
   31,788.72x = 47,680.96 × 13,063.91
4. Step 4: Simplify right side
   31,788.72x = 622,899,770.15
5. Step 5: Solve for x
   x = 622,899,770.15/31,788.72
6. Step 6: Final answer
   x = 19,594.99