Finding the Fourth Proportional to 31,223.32, 46,839.30 and 12,751

Step by Step Solution

1. Step 1: Write the proportion equation
   31,223.32 : 46,839.30 = 12,751 : x
2. Step 2: Convert to fraction form
   31,223.32/46,839.30 = 12,751/x
3. Step 3: Cross multiply
   31,223.32x = 46,839.30 × 12,751
4. Step 4: Simplify right side
   31,223.32x = 597,247,914.30
5. Step 5: Solve for x
   x = 597,247,914.30/31,223.32
6. Step 6: Final answer
   x = 19,128.26