Finding the Fourth Proportional to 13,396.10, 20,091.83 and 3,535.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,396.10 : 20,091.83 = 3,535.47 : x
2. Step 2: Convert to fraction form
   13,396.10/20,091.83 = 3,535.47/x
3. Step 3: Cross multiply
   13,396.10x = 20,091.83 × 3,535.47
4. Step 4: Simplify right side
   13,396.10x = 71,034,044.53
5. Step 5: Solve for x
   x = 71,034,044.53/13,396.10
6. Step 6: Final answer
   x = 5,302.59