Finding the Fourth Proportional to 13,892.10, 20,837.42 and 3,503.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,892.10 : 20,837.42 = 3,503.94 : x
2. Step 2: Convert to fraction form
   13,892.10/20,837.42 = 3,503.94/x
3. Step 3: Cross multiply
   13,892.10x = 20,837.42 × 3,503.94
4. Step 4: Simplify right side
   13,892.10x = 73,013,069.43
5. Step 5: Solve for x
   x = 73,013,069.43/13,892.10
6. Step 6: Final answer
   x = 5,255.73