Finding the Fourth Proportional to 33,686.56, 50,548.11 and 13,978.63

Step by Step Solution

1. Step 1: Write the proportion equation
   33,686.56 : 50,548.11 = 13,978.63 : x
2. Step 2: Convert to fraction form
   33,686.56/50,548.11 = 13,978.63/x
3. Step 3: Cross multiply
   33,686.56x = 50,548.11 × 13,978.63
4. Step 4: Simplify right side
   33,686.56x = 706,593,326.89
5. Step 5: Solve for x
   x = 706,593,326.89/33,686.56
6. Step 6: Final answer
   x = 20,975.53