Finding the Fourth Proportional to 31,310.72, 46,986.43 and 13,558.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,310.72 : 46,986.43 = 13,558.71 : x
2. Step 2: Convert to fraction form
   31,310.72/46,986.43 = 13,558.71/x
3. Step 3: Cross multiply
   31,310.72x = 46,986.43 × 13,558.71
4. Step 4: Simplify right side
   31,310.72x = 637,075,344.41
5. Step 5: Solve for x
   x = 637,075,344.41/31,310.72
6. Step 6: Final answer
   x = 20,346.88