Finding the Fourth Proportional to 13,792.55, 20,682.68 and 3,929.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,792.55 : 20,682.68 = 3,929.49 : x
2. Step 2: Convert to fraction form
   13,792.55/20,682.68 = 3,929.49/x
3. Step 3: Cross multiply
   13,792.55x = 20,682.68 × 3,929.49
4. Step 4: Simplify right side
   13,792.55x = 81,272,364.59
5. Step 5: Solve for x
   x = 81,272,364.59/13,792.55
6. Step 6: Final answer
   x = 5,892.49