Finding the Fourth Proportional to 42,076.72, 63,093.48 and 13,986.64

Step by Step Solution

1. Step 1: Write the proportion equation
   42,076.72 : 63,093.48 = 13,986.64 : x
2. Step 2: Convert to fraction form
   42,076.72/63,093.48 = 13,986.64/x
3. Step 3: Cross multiply
   42,076.72x = 63,093.48 × 13,986.64
4. Step 4: Simplify right side
   42,076.72x = 882,465,791.11
5. Step 5: Solve for x
   x = 882,465,791.11/42,076.72
6. Step 6: Final answer
   x = 20,972.78