Finding the Fourth Proportional to 31,311.72, 46,987.93 and 13,559.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,311.72 : 46,987.93 = 13,559.71 : x
2. Step 2: Convert to fraction form
   31,311.72/46,987.93 = 13,559.71/x
3. Step 3: Cross multiply
   31,311.72x = 46,987.93 × 13,559.71
4. Step 4: Simplify right side
   31,311.72x = 637,142,704.30
5. Step 5: Solve for x
   x = 637,142,704.30/31,311.72
6. Step 6: Final answer
   x = 20,348.38