Finding the Fourth Proportional to 13,429.99, 20,147.15 and 5,641.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,429.99 : 20,147.15 = 5,641.03 : x
2. Step 2: Convert to fraction form
   13,429.99/20,147.15 = 5,641.03/x
3. Step 3: Cross multiply
   13,429.99x = 20,147.15 × 5,641.03
4. Step 4: Simplify right side
   13,429.99x = 113,650,677.56
5. Step 5: Solve for x
   x = 113,650,677.56/13,429.99
6. Step 6: Final answer
   x = 8,462.45