Finding the Fourth Proportional to 33,776.12, 50,643.12 and 12,715.31

Step by Step Solution

1. Step 1: Write the proportion equation
   33,776.12 : 50,643.12 = 12,715.31 : x
2. Step 2: Convert to fraction form
   33,776.12/50,643.12 = 12,715.31/x
3. Step 3: Cross multiply
   33,776.12x = 50,643.12 × 12,715.31
4. Step 4: Simplify right side
   33,776.12x = 643,943,144.46
5. Step 5: Solve for x
   x = 643,943,144.46/33,776.12
6. Step 6: Final answer
   x = 19,065.04