Finding the Fourth Proportional to 31,314.58, 46,960.16 and 12,588.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,314.58 : 46,960.16 = 12,588.28 : x
2. Step 2: Convert to fraction form
   31,314.58/46,960.16 = 12,588.28/x
3. Step 3: Cross multiply
   31,314.58x = 46,960.16 × 12,588.28
4. Step 4: Simplify right side
   31,314.58x = 591,147,642.92
5. Step 5: Solve for x
   x = 591,147,642.92/31,314.58
6. Step 6: Final answer
   x = 18,877.71