Finding the Fourth Proportional to 31,238.25, 46,857.42 and 12,770.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,238.25 : 46,857.42 = 12,770.25 : x
2. Step 2: Convert to fraction form
   31,238.25/46,857.42 = 12,770.25/x
3. Step 3: Cross multiply
   31,238.25x = 46,857.42 × 12,770.25
4. Step 4: Simplify right side
   31,238.25x = 598,380,967.76
5. Step 5: Solve for x
   x = 598,380,967.76/31,238.25
6. Step 6: Final answer
   x = 19,155.39