Finding the Fourth Proportional to 21,449.91, 29,590.86 and 13,496.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,449.91 : 29,590.86 = 13,496.52 : x
2. Step 2: Convert to fraction form
   21,449.91/29,590.86 = 13,496.52/x
3. Step 3: Cross multiply
   21,449.91x = 29,590.86 × 13,496.52
4. Step 4: Simplify right side
   21,449.91x = 399,373,485.85
5. Step 5: Solve for x
   x = 399,373,485.85/21,449.91
6. Step 6: Final answer
   x = 18,618.89