Finding the Fourth Proportional to 33,920.79, 50,857.43 and 12,862.01

Step by Step Solution

1. Step 1: Write the proportion equation
   33,920.79 : 50,857.43 = 12,862.01 : x
2. Step 2: Convert to fraction form
   33,920.79/50,857.43 = 12,862.01/x
3. Step 3: Cross multiply
   33,920.79x = 50,857.43 × 12,862.01
4. Step 4: Simplify right side
   33,920.79x = 654,128,454.64
5. Step 5: Solve for x
   x = 654,128,454.64/33,920.79
6. Step 6: Final answer
   x = 19,284.00