Finding the Fourth Proportional to 21,452.56, 29,606.16 and 13,501.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,452.56 : 29,606.16 = 13,501.60 : x
2. Step 2: Convert to fraction form
   21,452.56/29,606.16 = 13,501.60/x
3. Step 3: Cross multiply
   21,452.56x = 29,606.16 × 13,501.60
4. Step 4: Simplify right side
   21,452.56x = 399,730,529.86
5. Step 5: Solve for x
   x = 399,730,529.86/21,452.56
6. Step 6: Final answer
   x = 18,633.23