Finding the Fourth Proportional to 31,501.98, 47,253.31 and 13,487.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,501.98 : 47,253.31 = 13,487.78 : x
2. Step 2: Convert to fraction form
   31,501.98/47,253.31 = 13,487.78/x
3. Step 3: Cross multiply
   31,501.98x = 47,253.31 × 13,487.78
4. Step 4: Simplify right side
   31,501.98x = 637,342,249.55
5. Step 5: Solve for x
   x = 637,342,249.55/31,501.98
6. Step 6: Final answer
   x = 20,231.82