Finding the Fourth Proportional to 42,072.72, 63,087.48 and 13,982.64

Step by Step Solution

1. Step 1: Write the proportion equation
   42,072.72 : 63,087.48 = 13,982.64 : x
2. Step 2: Convert to fraction form
   42,072.72/63,087.48 = 13,982.64/x
3. Step 3: Cross multiply
   42,072.72x = 63,087.48 × 13,982.64
4. Step 4: Simplify right side
   42,072.72x = 882,129,521.35
5. Step 5: Solve for x
   x = 882,129,521.35/42,072.72
6. Step 6: Final answer
   x = 20,966.78