Finding the Fourth Proportional to 13,768.74, 20,507.38 and 13,701.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,768.74 : 20,507.38 = 13,701.62 : x
2. Step 2: Convert to fraction form
   13,768.74/20,507.38 = 13,701.62/x
3. Step 3: Cross multiply
   13,768.74x = 20,507.38 × 13,701.62
4. Step 4: Simplify right side
   13,768.74x = 280,984,327.96
5. Step 5: Solve for x
   x = 280,984,327.96/13,768.74
6. Step 6: Final answer
   x = 20,407.41