Finding the Fourth Proportional to 31,513.67, 47,279.29 and 13,745.92

Step by Step Solution

1. Step 1: Write the proportion equation
   31,513.67 : 47,279.29 = 13,745.92 : x
2. Step 2: Convert to fraction form
   31,513.67/47,279.29 = 13,745.92/x
3. Step 3: Cross multiply
   31,513.67x = 47,279.29 × 13,745.92
4. Step 4: Simplify right side
   31,513.67x = 649,897,185.43
5. Step 5: Solve for x
   x = 649,897,185.43/31,513.67
6. Step 6: Final answer
   x = 20,622.71