Finding the Fourth Proportional to 31,456.26, 47,200.79 and 12,750.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,456.26 : 47,200.79 = 12,750.12 : x
2. Step 2: Convert to fraction form
   31,456.26/47,200.79 = 12,750.12/x
3. Step 3: Cross multiply
   31,456.26x = 47,200.79 × 12,750.12
4. Step 4: Simplify right side
   31,456.26x = 601,815,736.59
5. Step 5: Solve for x
   x = 601,815,736.59/31,456.26
6. Step 6: Final answer
   x = 19,131.83