Finding the Fourth Proportional to 13,796.55, 20,688.69 and 3,933.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,796.55 : 20,688.69 = 3,933.60 : x
2. Step 2: Convert to fraction form
   13,796.55/20,688.69 = 3,933.60/x
3. Step 3: Cross multiply
   13,796.55x = 20,688.69 × 3,933.60
4. Step 4: Simplify right side
   13,796.55x = 81,381,030.98
5. Step 5: Solve for x
   x = 81,381,030.98/13,796.55
6. Step 6: Final answer
   x = 5,898.65