Finding the Fourth Proportional to 31,238.50, 46,864.23 and 12,770.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,238.50 : 46,864.23 = 12,770.50 : x
2. Step 2: Convert to fraction form
   31,238.50/46,864.23 = 12,770.50/x
3. Step 3: Cross multiply
   31,238.50x = 46,864.23 × 12,770.50
4. Step 4: Simplify right side
   31,238.50x = 598,479,649.22
5. Step 5: Solve for x
   x = 598,479,649.22/31,238.50
6. Step 6: Final answer
   x = 19,158.40