Finding the Fourth Proportional to 21,404.42, 29,537.61 and 11,973.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,404.42 : 29,537.61 = 11,973.86 : x
2. Step 2: Convert to fraction form
   21,404.42/29,537.61 = 11,973.86/x
3. Step 3: Cross multiply
   21,404.42x = 29,537.61 × 11,973.86
4. Step 4: Simplify right side
   21,404.42x = 353,679,206.87
5. Step 5: Solve for x
   x = 353,679,206.87/21,404.42
6. Step 6: Final answer
   x = 16,523.65